Stack Overflow

Stack Overflow

Q&A for professional and enthusiast programmers

9.7m questions
16m answers
74% answered
4.4m users
7.7m visits/day
8k questions/day
7y site age
Server Fault

Server Fault

Q&A for system and network administrators

199k questions
353k answers
82% answered
217k users
391k visits/day
108 questions/day
6y3m site age
Super User

Super User

Q&A for computer enthusiasts and power users

271k questions
422k answers
71% answered
340k users
792k visits/day
184 questions/day
6y site age
Meta Stack Exchange

Meta Stack Exchange

Q&A for meta-discussion of the Stack Exchange family of Q&A websites

73k questions
113k answers
88% answered
131k users
9.8k visits/day
25 questions/day
6y1m site age
Web Applications

Web Applications

Q&A for power users of web applications

17k questions
26k answers
83% answered
57k users
46k visits/day
12 questions/day
5y1m site age
Arqade

Arqade

Q&A for passionate videogamers on all platforms

56k questions
96k answers
92% answered
69k users
354k visits/day
45 questions/day
5y site age
Webmasters

Webmasters

Q&A for pro webmasters

21k questions
35k answers
96% answered
38k users
13k visits/day
12 questions/day
5y site age
Seasoned Advice

Seasoned Advice

Q&A for professional and amateur chefs

13k questions
32k answers
98% answered
24k users
90k visits/day
8.3 questions/day
5y site age
Game Development

Game Development

Q&A for professional and independent game developers

27k questions
46k answers
90% answered
51k users
25k visits/day
22 questions/day
5y site age
Photography

Photography

Q&A for professional, enthusiast and amateur photographers

14k questions
36k answers
97% answered
26k users
27k visits/day
9.2 questions/day
5y site age
Cross Validated

Cross Validated

Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization

60k questions
62k answers
63% answered
59k users
55k visits/day
82 questions/day
5y site age
Mathematics

Mathematics

Q&A for people studying math at any level and professionals in related fields

457k questions
668k answers
80% answered
193k users
108k visits/day
476 questions/day
5y site age
Home Improvement

Home Improvement

Q&A for contractors and serious DIYers

17k questions
31k answers
87% answered
24k users
81k visits/day
18 questions/day
5y site age
Geographic Information Systems

Geographic Information Systems

Q&A for cartographers, geographers and GIS professionals

52k questions
66k answers
74% answered
39k users
43k visits/day
59 questions/day
5y site age
TeX - LaTeX

TeX - LaTeX

Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems

91k questions
123k answers
93% answered
64k users
77k visits/day
75 questions/day
5y site age
Ask Ubuntu

Ask Ubuntu

Q&A for Ubuntu users and developers

194k questions
256k answers
68% answered
274k users
451k visits/day
186 questions/day
5y site age
Personal Finance & Money

Personal Finance & Money

Q&A for people who want to be financially literate

11k questions
22k answers
95% answered
19k users
20k visits/day
11 questions/day
4y11m site age
English Language & Usage

English Language & Usage

Q&A for linguists, etymologists, and serious English language enthusiasts

55k questions
141k answers
97% answered
88k users
303k visits/day
61 questions/day
4y11m site age
Stack Apps

Stack Apps

Q&A for apps, scripts, and development with the Stack Exchange API

2k questions
2.1k answers
64% answered
21k users
608 visits/day
1.5 questions/day
5y4m site age
User Experience

User Experience

Q&A for user experience researchers and experts

17k questions
47k answers
97% answered
51k users
18k visits/day
12 questions/day
4y11m site age
Unix & Linux

Unix & Linux

Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.

68k questions
107k answers
79% answered
103k users
221k visits/day
84 questions/day
4y11m site age
WordPress Development

WordPress Development

Q&A for WordPress developers and administrators

58k questions
74k answers
73% answered
52k users
45k visits/day
51 questions/day
4y11m site age
Theoretical Computer Science

Theoretical Computer Science

Q&A for theoretical computer scientists and researchers in related fields

7.1k questions
11k answers
78% answered
21k users
1.7k visits/day
3.5 questions/day
4y11m site age
Ask Different

Ask Different

Q&A for power users of Apple hardware and software

58k questions
88k answers
70% answered
96k users
274k visits/day
55 questions/day
4y11m site age
Role-playing Games

Role-playing Games

Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games

13k questions
34k answers
100% answered
14k users
15k visits/day
12 questions/day
4y11m site age
Bicycles

Bicycles

Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles

6.3k questions
17k answers
96% answered
13k users
24k visits/day
5.7 questions/day
4y11m site age
Programmers

Programmers

Q&A for professional programmers interested in conceptual questions about software development

36k questions
127k answers
96% answered
149k users
84k visits/day
32 questions/day
4y10m site age
Electrical Engineering

Electrical Engineering

Q&A for electronics and electrical engineering professionals, students, and enthusiasts

48k questions
86k answers
88% answered
52k users
69k visits/day
64 questions/day
4y10m site age
Android Enthusiasts

Android Enthusiasts

Q&A for enthusiasts and power users of the Android operating system

32k questions
38k answers
62% answered
78k users
154k visits/day
37 questions/day
4y10m site age
Board & Card Games

Board & Card Games

Q&A for people who like playing board games, designing board games or modifying the rules of existing board games

5.5k questions
11k answers
98% answered
9k users
9.3k visits/day
6.6 questions/day
4y9m site age
Physics

Physics

Q&A for active researchers, academics and students of physics

56k questions
87k answers
83% answered
56k users
46k visits/day
64 questions/day
4y8m site age
Homebrewing

Homebrewing

Q&A for dedicated home brewers and serious enthusiasts

3.8k questions
8.9k answers
99% answered
5.2k users
4.8k visits/day
1.6 questions/day
4y8m site age
Information Security

Information Security

Q&A for Information security professionals

22k questions
46k answers
94% answered
61k users
56k visits/day
27 questions/day
4y8m site age
Writers

Writers

Q&A for authors, editors, reviewers, professional writers, and aspiring writers

3.2k questions
9.6k answers
99% answered
9.6k users
5.3k visits/day
3.1 questions/day
4y8m site age
Video Production

Video Production

Q&A for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation

2.6k questions
3.8k answers
88% answered
7.1k users
3.6k visits/day
3.2 questions/day
4y7m site age
Graphic Design

Graphic Design

Q&A for Graphic Design professionals, students, and enthusiasts

13k questions
24k answers
91% answered
33k users
63k visits/day
19 questions/day
4y6m site age
Database Administrators

Database Administrators

Q&A for database professionals who wish to improve their database skills and learn from others in the community

35k questions
46k answers
80% answered
55k users
103k visits/day
41 questions/day
4y6m site age
Science Fiction & Fantasy

Science Fiction & Fantasy

Q&A for science fiction and fantasy enthusiasts

22k questions
46k answers
95% answered
34k users
56k visits/day
31 questions/day
4y6m site age
Code Review

Code Review

Q&A for peer programmer code reviews

25k questions
43k answers
94% answered
65k users
43k visits/day
34 questions/day
4y6m site age
Programming Puzzles & Code Golf

Programming Puzzles & Code Golf

Q&A for programming puzzle enthusiasts and code golfers

3.5k questions
33k answers
98% answered
29k users
3.4k visits/day
5.2 questions/day
4y6m site age
Quantitative Finance

Quantitative Finance

Q&A for finance professionals and academics

4.7k questions
7.2k answers
80% answered
9.2k users
4.3k visits/day
5.7 questions/day
4y6m site age
Project Management

Project Management

Q&A for project managers

2.6k questions
9k answers
98% answered
11k users
4.4k visits/day
2.6 questions/day
4y5m site age
Skeptics

Skeptics

Q&A for scientific skepticism

5.8k questions
7.4k answers
86% answered
18k users
13k visits/day
3.5 questions/day
4y5m site age
Physical Fitness

Physical Fitness

Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs

5k questions
11k answers
97% answered
11k users
12k visits/day
4.0 questions/day
4y4m site age
Drupal Answers

Drupal Answers

Q&A for Drupal developers and administrators

52k questions
66k answers
68% answered
30k users
30k visits/day
46 questions/day
4y4m site age
Motor Vehicle Maintenance & Repair

Motor Vehicle Maintenance & Repair

Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles

5.2k questions
8.7k answers
89% answered
7.9k users
29k visits/day
8.6 questions/day
4y4m site age
Parenting

Parenting

Q&A for parents, grandparents, nannies and others with a parenting role

3.3k questions
12k answers
99% answered
11k users
19k visits/day
3.8 questions/day
4y4m site age
SharePoint

SharePoint

Q&A for SharePoint enthusiasts

52k questions
65k answers
67% answered
27k users
56k visits/day
50 questions/day
4y3m site age
Music: Practice & Theory

Music: Practice & Theory

Q&A for musicians, students, and enthusiasts

5.9k questions
17k answers
99% answered
13k users
15k visits/day
8.1 questions/day
4y3m site age
Software Quality Assurance & Testing

Software Quality Assurance & Testing

Q&A for software quality control experts, automation engineers, and software testers

3k questions
7.1k answers
88% answered
9.6k users
7.6k visits/day
3.4 questions/day
4y2m site age
Mi Yodeya

Mi Yodeya

Q&A for those who base their lives on Jewish law and tradition and anyone interested in learning more

16k questions
27k answers
86% answered
4.9k users
3k visits/day
12 questions/day
4y2m site age
German Language

German Language

Q&A for speakers of German wanting to discuss the finer points of the language and translation

5.1k questions
12k answers
100% answered
8.6k users
8.9k visits/day
5.1 questions/day
4y2m site age
Japanese Language

Japanese Language

Q&A for students, teachers, and linguists wanting to discuss the finer points of the Japanese language

6.6k questions
11k answers
99% answered
6.7k users
4.1k visits/day
8.8 questions/day
4y2m site age
Philosophy

Philosophy

Q&A for those interested in logical reasoning

4.6k questions
11k answers
93% answered
10k users
2.5k visits/day
5.1 questions/day
4y1m site age
Gardening & Landscaping

Gardening & Landscaping

Q&A for gardeners and landscapers

4.2k questions
7.2k answers
98% answered
5k users
9.6k visits/day
4.9 questions/day
4y1m site age
Travel

Travel

Q&A for road warriors and seasoned travelers

12k questions
22k answers
99% answered
20k users
31k visits/day
24 questions/day
4y1m site age
Personal Productivity

Personal Productivity

Q&A for people wanting to improve their personal productivity

1.9k questions
7k answers
100% answered
11k users
1.6k visits/day
1.1 questions/day
4y1m site age
Cryptography

Cryptography

Q&A for software developers, mathematicians and others interested in cryptography

6.9k questions
9.6k answers
89% answered
16k users
4.6k visits/day
7.7 questions/day
4y site age
Signal Processing

Signal Processing

Q&A for practitioners of the art and science of signal, image and video processing

7.2k questions
9.2k answers
74% answered
10k users
5.3k visits/day
9.8 questions/day
3y11m site age
French Language

French Language

Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language

3k questions
7k answers
100% answered
6k users
5.6k visits/day
3.2 questions/day
3y11m site age
Christianity

Christianity

Q&A for committed Christians, experts in Christianity and those interested in learning more

7k questions
18k answers
99% answered
10k users
21k visits/day
5.0 questions/day
3y11m site age
Bitcoin

Bitcoin

Q&A for Bitcoin crypto-currency enthusiasts

9.1k questions
14k answers
90% answered
16k users
5.2k visits/day
7.5 questions/day
3y11m site age
Linguistics

Linguistics

Q&A for professional linguists and others with an interest in linguistic research and theory

3.1k questions
5.1k answers
82% answered
5.4k users
1.8k visits/day
3.0 questions/day
3y10m site age
Biblical Hermeneutics

Biblical Hermeneutics

Q&A for professors, theologians, and those interested in exegetical analysis of biblical texts

2.6k questions
5.4k answers
94% answered
4.2k users
6.6k visits/day
2.9 questions/day
3y9m site age
History

History

Q&A for historians and history buffs

4.1k questions
8.2k answers
95% answered
7.8k users
6k visits/day
3.1 questions/day
3y9m site age
LEGO® Answers

LEGO® Answers

Q&A for LEGO® and building block enthusiasts

1.3k questions
2.4k answers
96% answered
3.5k users
2k visits/day
1.4 questions/day
3y9m site age
Spanish Language

Spanish Language

Q&A for students, teachers, and linguists wanting to discuss the finer points of the Spanish language

2.3k questions
5.8k answers
100% answered
4.9k users
6.2k visits/day
2.8 questions/day
3y8m site age
Computational Science

Computational Science

Q&A for scientists using computers to solve scientific problems

4.2k questions
6.2k answers
82% answered
9.2k users
2.2k visits/day
3.4 questions/day
3y8m site age
Movies & TV

Movies & TV

Q&A for movie and tv enthusiasts

8.1k questions
13k answers
94% answered
15k users
30k visits/day
13 questions/day
3y8m site age
Chinese Language

Chinese Language

Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language

2.7k questions
7.3k answers
99% answered
5.7k users
1.4k visits/day
3.5 questions/day
3y7m site age
Biology

Biology

Q&A for biology researchers, academics, and students

8.6k questions
11k answers
90% answered
10k users
9.6k visits/day
11 questions/day
3y7m site age
Poker

Poker

Q&A for serious players and enthusiasts of poker

729 questions
1.8k answers
98% answered
2.2k users
1.2k visits/day
1.4 questions/day
3y6m site age
Mathematica

Mathematica

Q&A for users of Mathematica

25k questions
39k answers
88% answered
19k users
8.1k visits/day
32 questions/day
3y6m site age
Cognitive Sciences

Cognitive Sciences

Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry

2.9k questions
3.6k answers
85% answered
6.1k users
1.6k visits/day
3.5 questions/day
3y6m site age
The Great Outdoors

The Great Outdoors

Q&A for people who love outdoor activities, excursions, and outdoorsmanship

2k questions
4.7k answers
99% answered
3.9k users
4.7k visits/day
1.6 questions/day
3y6m site age
Martial Arts

Martial Arts

Q&A for students and teachers of all martial arts

783 questions
2.9k answers
99% answered
2.8k users
1.6k visits/day
0.8 questions/day
3y6m site age
Sports

Sports

Q&A for participants in team and individual sport activities

2.2k questions
3.6k answers
94% answered
4k users
5.2k visits/day
1.7 questions/day
3y5m site age
Academia

Academia

Q&A for academics and those enrolled in higher education

9.8k questions
24k answers
99% answered
27k users
17k visits/day
16 questions/day
3y5m site age
Computer Science

Computer Science

Q&A for students, researchers and practitioners of computer science

11k questions
14k answers
87% answered
26k users
4.7k visits/day
12 questions/day
3y4m site age
The Workplace

The Workplace

Q&A for members of the workforce navigating the professional setting

7.6k questions
24k answers
100% answered
25k users
30k visits/day
14 questions/day
3y3m site age
Windows Phone

Windows Phone

Q&A for enthusiasts and power users of Windows Phone OS

2.1k questions
2.9k answers
85% answered
6k users
8.2k visits/day
3.5 questions/day
3y3m site age
Chemistry

Chemistry

Q&A for scientists, academics, teachers and students

9k questions
12k answers
90% answered
9.8k users
12k visits/day
16 questions/day
3y3m site age
Chess

Chess

Q&A for serious players and enthusiasts of chess

1.9k questions
4.6k answers
95% answered
5.3k users
2.4k visits/day
2.3 questions/day
3y2m site age
Raspberry Pi

Raspberry Pi

Q&A for users and developers of hardware and software for Raspberry Pi

7.9k questions
11k answers
82% answered
22k users
22k visits/day
13 questions/day
3y1m site age
Russian Language

Russian Language

Q&A for students, teachers, and linguists wanting to discuss the finer points of the Russian language

1.3k questions
3.8k answers
100% answered
4.1k users
772 visits/day
2.2 questions/day
3y1m site age
Islam

Islam

Q&A for Muslims, experts in Islam, and those interested in learning more about Islam

3.9k questions
7.2k answers
85% answered
6k users
25k visits/day
6.5 questions/day
3y1m site age
Salesforce

Salesforce

Q&A for Salesforce administrators, implementation experts, developers and anybody in-between

28k questions
35k answers
76% answered
14k users
28k visits/day
51 questions/day
3y site age
Ask Patents

Ask Patents

Q&A for people interested in improving and participating in the patent system

1.8k questions
3.2k answers
78% answered
7.5k users
1.3k visits/day
2.4 questions/day
2y10m site age
Genealogy & Family History

Genealogy & Family History

Q&A for expert genealogists and people interested in genealogy or family history

1.2k questions
2.5k answers
94% answered
1.8k users
818 visits/day
1.4 questions/day
2y9m site age
Robotics

Robotics

Q&A for professional robotic engineers, hobbyists, researchers and students

1.8k questions
3k answers
87% answered
5.7k users
1.6k visits/day
2.1 questions/day
2y9m site age
ExpressionEngine® Answers

ExpressionEngine® Answers

Q&A for administrators, end users, developers and designers for ExpressionEngine® CMS

10k questions
13k answers
80% answered
3.9k users
1.7k visits/day
5.1 questions/day
2y8m site age
Politics

Politics

Q&A for people interested in governments, policies, and political processes

1.7k questions
2.9k answers
89% answered
3.6k users
1.9k visits/day
2.3 questions/day
2y7m site age
Anime & Manga

Anime & Manga

Q&A for anime and manga fans

5.8k questions
7.8k answers
87% answered
8.7k users
19k visits/day
10 questions/day
2y7m site age
Magento

Magento

Q&A for users of the Magento e-Commerce platform

22k questions
27k answers
82% answered
16k users
29k visits/day
44 questions/day
2y6m site age
English Language Learners

English Language Learners

Q&A for speakers of other languages learning English

17k questions
30k answers
97% answered
16k users
32k visits/day
30 questions/day
2y6m site age
Sustainable Living

Sustainable Living

Q&A for folks dedicated to a lifestyle that can be maintained indefinitely without depleting available resources

742 questions
1.5k answers
97% answered
2.2k users
975 visits/day
0.6 questions/day
2y6m site age
Tridion

Tridion

Q&A for Tridion developers and administrators

3.3k questions
5.5k answers
95% answered
1.4k users
892 visits/day
4.6 questions/day
2y5m site age
Reverse Engineering

Reverse Engineering

Q&A for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation

2.1k questions
3.1k answers
90% answered
6.5k users
2.6k visits/day
3.1 questions/day
2y4m site age
Network Engineering

Network Engineering

Q&A for network engineers

3.9k questions
6.2k answers
85% answered
11k users
11k visits/day
9.6 questions/day
2y2m site age
Open Data

Open Data

Q&A for developers and researchers interested in open data

1.4k questions
2.5k answers
86% answered
5.6k users
1.3k visits/day
3.0 questions/day
2y2m site age
Freelancing

Freelancing

Q&A for self-employed and freelance workers

793 questions
2k answers
97% answered
5.9k users
958 visits/day
1.4 questions/day
2y2m site age
Blender

Blender

Q&A for people who use Blender to create 3D graphics, animations, or games

9.7k questions
11k answers
86% answered
9.3k users
11k visits/day
22 questions/day
2y2m site age
MathOverflow

MathOverflow

Q&A for professional mathematicians

62k questions
101k answers
79% answered
45k users
18k visits/day
36 questions/day
5y10m site age
Space Exploration

Space Exploration

Q&A for spacecraft operators, scientists, engineers, and enthusiasts

2.6k questions
4.3k answers
94% answered
5.3k users
2.9k visits/day
4.5 questions/day
2y site age
Sound Design

Sound Design

Q&A for sound engineers, producers, editors, and enthusiasts

6.6k questions
21k answers
93% answered
5.9k users
4.3k visits/day
3.4 questions/day
4y8m site age
Astronomy

Astronomy

Q&A for astronomers and astrophysicists

2k questions
3.1k answers
92% answered
4.4k users
912 visits/day
3.1 questions/day
1y10m site age
Tor

Tor

Q&A for researchers, developers, and users of Tor

1.9k questions
2.4k answers
80% answered
4.1k users
3.5k visits/day
2.7 questions/day
1y10m site age
Pets

Pets

Q&A for pet owners, caretakers, breeders, veterinarians, and trainers

2.2k questions
3.3k answers
91% answered
3k users
8k visits/day
2.9 questions/day
1y9m site age
Amateur Radio

Amateur Radio

Q&A for amateur radio enthusiasts

943 questions
1.6k answers
96% answered
2.7k users
788 visits/day
2.1 questions/day
1y9m site age
Italian Language

Italian Language

Q&A for students, teachers, and linguists wanting to discuss the finer points of the Italian language

845 questions
1.6k answers
99% answered
1.5k users
1.1k visits/day
2.1 questions/day
1y8m site age
Stack Overflow em Português

Stack Overflow em Português

Q&A for programadores profissionais e entusiastas

23k questions
32k answers
83% answered
18k users
21k visits/day
75 questions/day
1y7m site age
Aviation

Aviation

Q&A for aircraft pilots, mechanics, and enthusiasts

3.4k questions
7.2k answers
99% answered
6.7k users
11k visits/day
12 questions/day
1y7m site age
Ebooks

Ebooks

Q&A for ebook publishers and readers

580 questions
973 answers
86% answered
2.8k users
1.3k visits/day
0.8 questions/day
1y7m site age
Beer

Beer

Q&A for beer aficionados and collectors

388 questions
893 answers
97% answered
2.2k users
1.7k visits/day
0.9 questions/day
1y6m site age
Software Recommendations

Software Recommendations

Q&A for people seeking specific software recommendations

5.7k questions
6.1k answers
58% answered
11k users
4.9k visits/day
13 questions/day
1y5m site age
Arduino

Arduino

Q&A for developers of open-source hardware and software that is compatible with Arduino

3.3k questions
4.6k answers
71% answered
7.7k users
5k visits/day
8.2 questions/day
1y5m site age
Expatriates

Expatriates

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