São Miguel may be small, but staying in the wrong part of the island can mean a surprising amount of unnecessary driving. After spending plenty of time exploring it, I found that each coast really does have its own rhythm: volcanic and dramatic in the west, greener and wetter in the east, wilder along the north coast, and generally calmer and sunnier in the south.
So where to stay in São Miguel is not just a question of finding a good hotel. Your base affects how easily you can follow the weather, how much time you spend on the road, and what the island feels like once the day-trippers disappear. Below, I break down the best areas to stay, who each one suits, where they fall short, and the hotels worth considering in each.
Where to Stay in São Miguel at a Glance
The best base in São Miguel depends less on finding the “best town” and more on how you plan to travel. For a first visit with easy logistics, Ponta Delgada is the safest choice. With a car, Ribeira Grande gives you a quieter and very practical position. Choose Furnas for hot springs, Sete Cidades for crater scenery, Vila Franca do Campo for the south coast, Nordeste for wild nature, and Mosteiros for sunsets and ocean pools.
| If you… | Stay in | Why |
|---|---|---|
| Are visiting São Miguel for the first time | Ponta Delgada | Easiest logistics, widest restaurant choice, tours and simple day trips. |
| Won’t rent a car | Ponta Delgada | By far the easiest base for airport access, tours, food and everyday services. |
| Have a car and want a practical all-round base | Ribeira Grande Also consider Lagoa / Caloura | Excellent island-wide access without staying in the busiest town. |
| Want hot springs, greenery and atmospheric evenings | Furnas | Stay inside the geothermal valley instead of experiencing it only as a day trip. |
| Want scenery and hiking above convenience | Sete Cidades | Crater scenery, quiet mornings and immediate access to the western volcanic landscape. |
| Want more sun, swimming and a south-coast feel | Vila Franca do Campo Also consider Caloura | Relaxed seaside atmosphere with good access to the island’s south and east. |
| Want surf and a more local north-coast base | Ribeira Grande | Santa Bárbara is nearby while the town remains practical for exploring the island. |
| Want remote nature, waterfalls and fewer people | Nordeste | The strongest base for experiencing São Miguel’s quieter and wilder eastern landscapes. |
| Want sunsets, volcanic pools and a quiet west-coast stay | Mosteiros | Atlantic sunsets, ocean pools and quick access to the Sete Cidades area. |
My default recommendation: for a first São Miguel trip, choose Ponta Delgada when convenience matters most, or Ribeira Grande if you have a car and would rather stay somewhere quieter. I would choose Furnas, Sete Cidades, Nordeste or Mosteiros when the setting itself is part of the reason for staying there, rather than because they are the easiest all-purpose bases.
Quick Hotel Shortlist
Four strong starting points for four very different São Miguel trips.
Affiliate disclosure: the hotel links below are affiliate links. If you book through them, I may earn a commission at no extra cost to you.
A strong first-base choice if you want Ponta Delgada convenience with more space than a standard hotel room, plus easy walking access to the marina and waterfront.
Check availability
A smart Ribeira Grande base if you want central north-coast access without giving up a proper pool, spa and oceanfront setting.
Check availabilityChoose this when staying in Furnas is part of the experience: the botanical gardens, thermal setting and atmospheric evenings are right outside your room.
Check availability
Best for travelers who want to wake up inside the crater, with the lake and trails close by and the village at its quietest before the day-trippers arrive.
Check availabilityBelow, I compare each part of São Miguel in detail, including who it suits, where it falls short, parking, restaurants, driving times and the hotels I would consider.
Table of Contents
How I Chose These Hotels
I spent a lot of time exploring São Miguel and stayed in several different properties while traveling around the island. Some of the hotels in this guide are places I stayed myself; others were recommended to me by friends and people I met locally.
For areas where I needed additional options, I chose properties based on location, facilities, practicality as a base and recent guest feedback. I have marked the recommendations throughout the guide so you can see which are based on my own or team members’ and friends’ stay and which come from recommendations or additional research.
Understanding the Island’s Geography Before You Choose
São Miguel looks small at first glance, but each part of the island has its own personality. A mountain ridge runs through the center and splits the weather in ways you start to notice as soon as you begin driving. The west is all volcanic drama: crater rims, cliffs, and those sudden views that make you pull over even when you’re already running late. The east feels completely different. The air is heavier, the forests are thicker, and the roads wind through long stretches of green that feel almost enclosed.
The south coast is the island’s calmest side. It’s warmer, flatter, and dotted with small towns where life moves at an easy pace. The north is rougher and more exposed, with black‑sand beaches, surf, and weather that can change in the time it takes to drink a coffee. Once you understand these shifts, choosing where to stay in São Miguel becomes much easier.
If weather is a major factor in your plans, my best time to visit the Azores guide breaks down the fog, rain, sea conditions and seasonal differences month by month.
Should You Stay in One Place or Split Your Stay in São Miguel?
For most trips of five nights or fewer, I would stay in one place. São Miguel is compact enough to explore from a single base, and staying put gives you more flexibility to follow the island’s unpredictable weather.
With a week or more, splitting your stay becomes more worthwhile. A few nights in Furnas or Nordeste reduce driving and let you experience the east after most day-trippers have left.
The trade-off is simple: one base means more driving but more flexibility; two bases mean shorter drives but more packing and less freedom if the weather turns bad.
For most first-time visitors, I would choose Ponta Delgada or Ribeira Grande as the main base, then add Furnas if the trip is long enough.
Where to Stay in São Miguel Without a Car
If you are visiting São Miguel without renting a car, stay in Ponta Delgada. It is the easiest base for airport transfers, organized day tours, whale-watching departures, restaurants, supermarkets, taxis and buses. You can also walk to most everyday essentials and go out for dinner without worrying about driving afterwards.
Furnas can work for 1–2 nights without a car if you specifically want to spend time in the geothermal valley and hot springs. I would not, however, use Furnas as my only base for exploring the whole island. Elsewhere on the island, public transport is much less useful for sightseeing, so you will rely more heavily on tours or taxis.
Bottom line: without a car, Ponta Delgada is by far the most practical place to stay in São Miguel.
Ponta Delgada
Best for people who want convenience
Most people start in Ponta Delgada, and it’s an easy place to settle into São Miguel. It feels more like a compact Atlantic town than a city, with black volcanic stone, quiet streets in the morning, and a waterfront that becomes much livelier later in the day.
Its biggest advantage is convenience. You can walk to restaurants, cafés, supermarkets and the marina, while day trips from Ponta Delgada and whale-watching trips are easy to join. It is also the best base if you are visiting São Miguel without a car.
If you do rent a car, parking is one of Ponta Delgada’s main drawbacks. Spaces in and around the historic centre can be limited or paid, so I would prioritize accommodation with private parking or check what parking is available nearby before booking.
Ponta Delgada also works very well as a single base for exploring the island. Sete Cidades, Lagoa do Fogo, Ribeira Grande and Furnas are all manageable as day trips, which gives you plenty of flexibility if the weather changes.
The trade-off is atmosphere. If you want to wake up surrounded by crater lakes, forest or dramatic coastline, there are more scenic places to stay. But for restaurants, logistics, tours and overall ease, Ponta Delgada remains the most practical choice for a first trip.
Apart from being a convenient base, the capital of São Miguel is also worth exploring in its own right. In my detailed Ponta Delgada guide, I cover the best things to do, places to eat and practical tips for visiting.
Ponta Delgada at a glance
- Best for
- First visits, no-car trips, restaurants and organized tours
- Not ideal for
- Travelers who want rural scenery outside their door
- Car
- Optional
- Restaurants
- Best choice on the island
- Parking
- Can be inconvenient in the historic centre
- Best nearby
- Airport, marina, whale watching and the waterfront
- My verdict
- Easiest and most practical single base for a first São Miguel trip
Best Places to Stay in Ponta Delgada
Lagoa & Caloura
Best for people with a car who want a quieter central base
Lagoa and nearby Caloura are a good alternative to Ponta Delgada if you want to stay on the south coast without being far from the rest of São Miguel. You are close enough to the capital for restaurants and airport access, while Furnas, Vila Franca do Campo and the north coast are all easy to reach by car.
Lagoa is the more practical choice, with supermarkets, restaurants and everyday services. Caloura is smaller and much more atmospheric, with a sheltered coastline, swimming spots and a quieter residential feel. The nearby village of Água de Pau gives this part of the island an even more local character.
The main drawback is that I would only recommend this area if you have a rental car. Without one, Ponta Delgada is considerably easier.
If you want a central location, south-coast weather and quieter evenings, Lagoa or Caloura can be one of the smartest bases on São Miguel.
Lagoa & Caloura at a glance
- Best for
- Travelers with a car who want a quiet, central south-coast base
- Not ideal for
- No-car trips, nightlife, or travelers wanting lots of restaurants on their doorstep
- Car
- Strongly recommended
- Restaurants
- Good choice in Lagoa; much more limited in quiet Caloura
- Parking
- Generally easier than central Ponta Delgada, especially at out-of-town properties
- Best nearby
- Lagoa do Fogo, Caloura coast, Água de Pau, Ponta Delgada and Vila Franca do Campo
- My verdict
- One of São Miguel’s smartest all-round bases if you have a rental car
Best Places to Stay in Lagoa & Caloura, São Miguel
Sete Cidades
Best for people who like hiking and want to wake up inside a volcano
Sete Cidades is the postcard image of São Miguel, but staying there is a completely different experience from visiting for an hour. When you sleep inside the crater, the landscape stops being a viewpoint and becomes a world of its own.
Some mornings you wake up to fog so thick the lake disappears. Other mornings the water is perfectly still, reflecting the sky like a mirror. The village itself is tiny and quiet, and once the day‑trippers leave, the crater becomes almost silent. You hear birds, wind, and the occasional cow somewhere on the slopes. It feels like a place that existed long before tourism and will exist long after.
Sete Cidades is ideal if you want nature to be the first thing you see each day. It’s also perfect for hikers and photographers who want to catch sunrise or sunset without racing across the island. The only real drawback is the weather: the crater can hold fog for hours. But when it clears, it’s magic.
Read my Sete Cidades guide for the best hiking routes, delicious food, authentic restaurants and more.
Sete Cidades at a glance
- Best for
- Scenery, hiking, photography, quiet mornings and staying inside the crater
- Not ideal for
- Travelers wanting lots of restaurants, nightlife, services or maximum weather flexibility
- Car
- Strongly recommended
- Restaurants
- Very limited compared with Ponta Delgada or Ribeira Grande
- Parking
- Generally easy at accommodation and around the village
- Best nearby
- Sete Cidades lakes, Vista do Rei, Boca do Inferno, crater trails and Mosteiros
- My verdict
- A spectacular experience base, but not the most practical choice for exploring the whole island
Best Places to Stay in Sete Cidades, São Miguel
Ribeira Grande
Best for people who want a practical and quieter base near the north coast
Ribeira Grande sits on the north coast, but in practice it’s the island’s centre of gravity. From here, nothing is too far. You can reach the west, east, and south without committing to long drives, which makes it a surprisingly smart base. It is also especially convenient for the São Miguel tea plantations and central highlands, so you can easily combine them with a day exploring the north coast.
The town itself isn’t polished or curated. It’s a real Azorean town where people live normal lives. Kids ride bikes along the river, surfers head to Santa Bárbara beach, and the Atlantic wind is almost always present. It doesn’t try to charm you, and that’s part of its appeal.
If you want a base that feels local, practical, and well‑connected, Ribeira Grande is the sweet spot. It’s also a good choice for longer stays, because you get more space for your money and you’re not locked into one side of the island.
Ribeira Grande at a glance
- Best for
- Travelers with a car who want a quieter, local base with strong island-wide access
- Not ideal for
- No-car trips, nightlife, or travelers who want the widest choice of tours and restaurants
- Car
- Recommended
- Restaurants
- Good local choice, but less variety than Ponta Delgada
- Parking
- Generally easier than in central Ponta Delgada
- Best nearby
- Santa Bárbara Beach, Lagoa do Fogo, Caldeira Velha, tea plantations and the north coast
- My verdict
- One of the best all-round bases on São Miguel if you have a rental car and prefer somewhere quieter than Ponta Delgada
Best Places to Stay in Ribeira Grande, São Miguel
Furnas
Best for people who like hot springs, greenery, and slow days
Furnas is the island’s geothermal heart, and staying there feels like stepping into a warm, green bowl of steam and forest. The air smells faintly of minerals, the ground exhales in little puffs of steam, and the whole valley feels like a natural spa.
Mornings in Furnas are slow and humid. Mist hangs low over the hills, and the botanical gardens feel like they’ve been growing for centuries. Evenings are for soaking in hot springs under the trees, with the sound of water echoing through the valley. It’s the most atmospheric place on the island, especially if you enjoy slow travel.
Furnas is also a great base for exploring the east, including Nordeste and the forest roads that cut through the island’s interior. The only trade‑off is the weather: it rains more here than on the south coast. But if you’re coming for the hot springs, the rain almost adds to the mood.
Have a look at my Furnas guide for best things to do, hot springs opening hours and more.
Furnas at a glance
- Best for
- Hot springs, greenery, slow travel and experiencing the geothermal valley after day-trippers leave
- Not ideal for
- Travelers focused mainly on western São Miguel or those wanting maximum weather flexibility
- Car
- Recommended, especially if Furnas is your main base
- Restaurants
- Good for a small town, with several solid local and hotel dining options
- Parking
- Generally straightforward, though central spots can be busier around major attractions
- Best nearby
- Terra Nostra, Poça da Dona Beija, Furnas Lake, geothermal fields and the eastern side of the island
- My verdict
- One of São Miguel’s best second bases if you want atmosphere, thermal pools and easier access to the east
Best Places to Stay in Furnas, São Miguel
Vila Franca do Campo
Best for people who want as much sun as possible
Vila Franca do Campo sits on the south coast, facing the little islet that becomes a natural swimming pool in summer. The south coast often feels sunnier and more sheltered, and you feel it immediately. The town has a warm, relaxed energy — pastel houses, a marina, and locals heading to the beach after work.
It’s not dramatic like the west or wild like the east. It’s comfortable. A place where you can exhale, swim, and enjoy the slower side of the island. It’s also well‑positioned: close to Furnas, close to Ponta Delgada, and easy to navigate.
If you want a sunny base with a calm, seaside feel, this is the spot.
Vila Franca do Campo at a glance
- Best for
- South-coast stays, swimming, the islet, relaxed evenings and travelers who want more sun
- Not ideal for
- Travelers focused mainly on western São Miguel or those wanting the widest restaurant and nightlife choice
- Car
- Recommended
- Restaurants
- Good local choice, though considerably smaller than Ponta Delgada
- Parking
- Generally manageable, but the marina area can be busier in summer
- Best nearby
- Vila Franca islet, marina, beaches, Lagoa do Congro, Furnas and the south coast
- My verdict
- A very pleasant south-coast base if swimming and a relaxed seaside atmosphere matter more than maximum convenience
Best Places to Stay in Vila Franca do Campo, São Miguel
Nordeste
Best for people who like waterfalls and wild nature
Nordeste is the far east of São Miguel, and it feels like the island’s wild frontier. The cliffs are higher, the forests thicker, and the viewpoints more dramatic. It’s the quietest part of the island, and the most rewarding if you love nature.
Driving here feels like moving through a series of green tunnels. Waterfalls appear out of nowhere. The viewpoints look like they belong in a fantasy film. At night, the sky is dark enough to see the Milky Way.
Nordeste is perfect if you want solitude, scenery, and mornings that feel like the world hasn’t woken up yet. The only downside is distance: you’re far from Sete Cidades. But if you’re splitting your stay, this is a beautiful second base.
For a detailed overview of the best things to do, such as splendid waterfalls, quiet hiking paths and more, check out my Nordeste São Miguel travel guide.
Nordeste at a glance
- Best for
- Wild scenery, waterfalls, viewpoints, quiet roads and travelers who want to slow down in the east
- Not ideal for
- Short first trips, no-car travel, nightlife or anyone wanting to minimize driving
- Car
- Essential for most travelers
- Restaurants
- Limited, with a smaller local selection than Ponta Delgada or Ribeira Grande
- Parking
- Generally easy at accommodation and around villages and viewpoints
- Best nearby
- Ribeira dos Caldeirões, Ponta do Sossego, Ponta da Madrugada, forest roads and the northeast coast
- My verdict
- A superb second base for nature-focused travelers, but too remote to be the most practical choice for a short first visit
Best Places to Stay in Nordeste São Miguel
Mosteiros
Best for sunsets and volcanic pools
Mosteiros sits on the far west coast, facing the open Atlantic. It’s a small fishing village with volcanic pools and the best sunsets on the island. The sea stacks rise from the water like sculptures, and the natural pools fill and empty with the tide.
Evenings in Mosteiros feel almost ritualistic. People stop what they’re doing, walk to the shore, and watch the sun drop behind the rocks. It’s slow, salty, and cinematic.
Mosteiros is ideal if you want ocean energy, dramatic sunsets, and a peaceful base that still gives you quick access to Sete Cidades.
Mosteiros at a glance
- Best for
- Sunsets, volcanic pools, quiet evenings and travelers who want a scenic west-coast stay
- Not ideal for
- No-car trips, nightlife, lots of restaurants or travelers planning to spend most days in eastern São Miguel
- Car
- Strongly recommended
- Restaurants
- Limited, with a small local selection rather than lots of choice
- Parking
- Generally easy around accommodation and the village
- Best nearby
- Mosteiros natural pools, Ponta da Ferraria, Sete Cidades, Vista do Rei and the west coast
- My verdict
- A beautiful experience base for sunsets and western São Miguel, but less practical as your only base for the entire island
Best Places to Stay in Mosteiros, São Miguel
São Miguel Base Comparison: Which Area Is Best for You?
There is no single best place to stay in São Miguel. Ponta Delgada wins for convenience, Ribeira Grande and Lagoa work especially well as practical bases with a car, while places such as Furnas, Sete Cidades, Nordeste and Mosteiros are stronger when the setting itself is part of the reason you are staying there.
Compare the best areas to stay in São Miguel
Scores are my editorial assessment for travelers choosing a base, with 5/5 representing the strongest option in that category.
| Area | Convenience | Scenery | Restaurants | Without a car | Parking | As your only base |
|---|---|---|---|---|---|---|
| Ponta Delgada | 5/5 | 3/5 | 5/5 | 5/5 | 2/5 | 5/5 |
| Lagoa & Caloura | 4/5 | 4/5 | 3/5 | 2/5 | 5/5 | 5/5 |
| Ribeira Grande | 5/5 | 4/5 | 4/5 | 2/5 | 4/5 | 5/5 |
| Furnas | 3/5 | 5/5 | 3/5 | 2/5 | 4/5 | 3/5 |
| Sete Cidades | 2/5 | 5/5 | 1/5 | 1/5 | 5/5 | 2/5 |
| Vila Franca do Campo | 4/5 | 4/5 | 3/5 | 2/5 | 4/5 | 4/5 |
| Nordeste | 2/5 | 5/5 | 2/5 | 1/5 | 5/5 | 2/5 |
| Mosteiros | 2/5 | 5/5 | 2/5 | 1/5 | 5/5 | 2/5 |
The pattern is clear: choose Ponta Delgada, Ribeira Grande or Lagoa/Caloura if you want one practical base for exploring the island. Choose Furnas, Sete Cidades, Nordeste or Mosteiros when staying in that particular landscape is part of the experience.

Approximate driving times from each base
These are realistic approximate driving ranges rather than promises to the minute. Weather, traffic, mountain roads and the exact location of your accommodation can all affect the journey.
| Base | Airport | Sete Cidades | Furnas | Nordeste |
|---|---|---|---|---|
| Ponta Delgada | 5–10 min | 35–40 min | 45–50 min | 50–60 min |
| Lagoa / Caloura | 15–25 min | 35–45 min | 30–35 min | 45–55 min |
| Ribeira Grande | 20–25 min | 40–45 min | 25–35 min | 35–40 min |
| Furnas | 40–50 min | 70–80 min | You’re here | 30–40 min |
| Sete Cidades | 25–35 min | You’re here | 70–80 min | 75–85 min |
| Vila Franca do Campo | 25–30 min | 45–50 min | 25–35 min | 35–45 min |
| Nordeste | 50–60 min | 75–85 min | 30–40 min | You’re here |
| Mosteiros | 35–45 min | 15–20 min | 70–75 min | 80–85 min |
Driving times are approximate and intended for comparing bases, not minute-by-minute route planning. They assume normal road conditions and no extended sightseeing stops.
FAQs About Where to Stay in São Miguel
Short answers to the most common questions about choosing a base, renting a car, splitting your stay and matching the right part of São Miguel to your trip.
What is the best area to stay in São Miguel for first-time visitors?
Ponta Delgada is the easiest choice for most first-time visitors. It has the island’s widest range of restaurants and services, excellent tour access, and works well for day trips in every direction. If you have a car and prefer somewhere quieter, Ribeira Grande is a strong alternative.
Where should you stay in São Miguel without a car?
Stay in Ponta Delgada. It is the most practical base for airport transfers, organized tours, whale-watching trips, restaurants, supermarkets, taxis and buses. Furnas can work for one or two nights if you specifically want the geothermal valley, but it is less convenient as your only island base.
Is Ponta Delgada or Ribeira Grande better?
Choose Ponta Delgada for convenience, restaurants, tours and no-car travel. Choose Ribeira Grande if you have a rental car and want a quieter, more local base with good access to both sides of the island. For a first trip without a car, Ponta Delgada wins; with a car, either works very well.
Is Furnas worth staying overnight?
Yes, especially on trips of a week or more. Furnas feels very different once many day-trippers leave, and staying overnight makes evening thermal baths and slower mornings much easier. I would usually use it as a second base rather than my only base for exploring all of São Miguel.
Should you split your stay in São Miguel?
For five nights or fewer, I would usually stay in one place. With seven nights or more, splitting the trip between a central or western base and two or three nights in Furnas or the east can reduce driving and give you a more varied experience.
Where should couples stay in São Miguel?
For atmosphere, couples should consider Furnas, Caloura, Sete Cidades or Mosteiros. Furnas is especially good for thermal pools and spa hotels, while Caloura offers a quieter south-coast setting. Ponta Delgada is better if restaurants and evening choice matter more than seclusion.
Where should families stay in São Miguel?
Ponta Delgada, Lagoa and Ribeira Grande are the easiest family bases. They combine practical services with manageable driving, and apartment-style accommodation is widely available. Families without a rental car will generally find Ponta Delgada the simplest option.
Where should you stay in São Miguel for beaches and swimming?
Vila Franca do Campo and Caloura are my strongest south-coast choices for swimming and a seaside feel. Vila Franca also gives you access to its famous volcanic islet in summer. Mosteiros is better if volcanic pools, dramatic coastline and sunsets matter more than conventional beaches.
Where should you stay in São Miguel for hiking and nature?
Sete Cidades is best for crater scenery and western hiking, while Nordeste is strongest for waterfalls, forest roads and quieter nature. Furnas is excellent for geothermal landscapes and trails in the east. All three are more atmospheric than practical as an only base for a short first trip.
What is the best area to stay in São Miguel with a rental car?
Ribeira Grande is one of the strongest all-round choices with a car because it is quiet, well positioned and convenient for the north coast. Lagoa and Caloura are excellent south-central alternatives. Ponta Delgada remains practical, but parking can be more inconvenient in the centre.
How many nights do you need in São Miguel?
Five to seven nights is a very good amount of time for a first trip. Three or four nights can cover the highlights at a faster pace, while a week gives you more flexibility for São Miguel’s changeable weather and makes a two-base stay more worthwhile.
Where should you stay in São Miguel for a short 3–4 night trip?
Use one base rather than changing hotels. Ponta Delgada is the easiest option, while Ribeira Grande works very well if you have a car and prefer somewhere quieter. On such a short trip, the time saved by moving accommodation rarely outweighs the loss of flexibility.
Final Thoughts: Where I Would Stay on São Miguel Again
After spending so much time exploring São Miguel, I would choose my base very differently depending on the kind of trip I was taking.
- First visit, 4 nights: Ponta Delgada or Ribeira Grande. Keep things simple, stay in one place, and use the flexibility to follow the weather.
- First visit, 7 nights with a car: 4–5 nights in a practical central or western base, then 2–3 nights in Furnas or the east.
- Without a car: Ponta Delgada, no contest.
- Returning visitor: I would skip the obvious choice and stay somewhere more atmospheric, like Mosteiros, Sete Cidades or Nordeste.
What I loved most about São Miguel was how quickly its mood changed. A misty crater in the morning could give way to bright Atlantic coastline an hour later, and even familiar roads somehow kept feeling different.
I would happily return without needing a long list of new sights. I would go back simply to drive those roads again, stop at viewpoints I already know, linger over meals, and spend more time in the corners of the island that stayed with me.
For the rest of the trip, see my São Miguel itinerary for the best things to do, practical advice and local tips.
Last Updated on 03/09/2026 by Panos













