Stack Overflow

Stack Overflow

Q&A for professional and enthusiast programmers

8m questions
14m answers
75% answered
3.5m users
6.7m visits/day
7.2k questions/day
6y2m site age
Server Fault

Server Fault

Q&A for professional system and network administrators

183k questions
330k answers
81% answered
177k users
295k visits/day
106 questions/day
5y5m site age
Super User

Super User

Q&A for computer enthusiasts and power users

237k questions
378k answers
72% answered
273k users
698k visits/day
193 questions/day
5y2m site age
Meta Stack Exchange

Meta Stack Exchange

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

68k questions
108k answers
88% answered
114k users
8.3k visits/day
16 questions/day
5y3m site age
Web Applications

Web Applications

Q&A for power users of web applications

16k questions
23k answers
79% answered
48k users
31k visits/day
11 questions/day
4y3m site age
Arqade

Arqade

Q&A for passionate videogamers on all platforms

47k questions
81k answers
93% answered
55k users
181k visits/day
29 questions/day
4y2m site age
Webmasters

Webmasters

Q&A for pro webmasters

18k questions
31k answers
96% answered
32k users
9.4k visits/day
13 questions/day
4y2m site age
Seasoned Advice

Seasoned Advice

Q&A for professional and amateur chefs

11k questions
28k answers
99% answered
19k users
52k visits/day
7.1 questions/day
4y2m site age
Game Development

Game Development

Q&A for professional and independent game developers

22k questions
40k answers
92% answered
41k users
20k visits/day
19 questions/day
4y2m site age
Photography

Photography

Q&A for professional, enthusiast and amateur photographers

12k questions
31k answers
98% answered
21k users
17k visits/day
7.1 questions/day
4y2m site age
Cross Validated

Cross Validated

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

43k questions
48k answers
66% answered
41k users
38k visits/day
58 questions/day
4y2m site age
Mathematics

Mathematics

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

326k questions
483k answers
80% answered
141k users
123k visits/day
491 questions/day
4y2m site age
Home Improvement

Home Improvement

Q&A for contractors and serious DIYers

12k questions
23k answers
90% answered
17k users
42k visits/day
12 questions/day
4y2m site age
Geographic Information Systems

Geographic Information Systems

Q&A for cartographers, geographers and GIS professionals

39k questions
51k answers
76% answered
28k users
33k visits/day
52 questions/day
4y2m site age
TeX - LaTeX

TeX - LaTeX

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

71k questions
100k answers
94% answered
50k users
70k visits/day
70 questions/day
4y2m site age
Ask Ubuntu

Ask Ubuntu

Q&A for Ubuntu users and developers

169k questions
214k answers
66% answered
224k users
377k visits/day
184 questions/day
4y2m site age
Personal Finance & Money

Personal Finance & Money

Q&A for people who want to be financially literate

8.1k questions
17k answers
97% answered
13k users
11k visits/day
10 questions/day
4y1m site age
English Language & Usage

English Language & Usage

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

42k questions
111k answers
99% answered
65k users
222k visits/day
45 questions/day
4y1m site age
Stack Apps

Stack Apps

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

1.8k questions
2k answers
65% answered
18k users
474 visits/day
0.6 questions/day
4y6m site age
User Experience

User Experience

Q&A for user experience researchers and experts

13k questions
40k answers
98% answered
42k users
13k visits/day
14 questions/day
4y1m site age
Unix & Linux

Unix & Linux

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

49k questions
80k answers
83% answered
71k users
156k visits/day
66 questions/day
4y1m site age
WordPress Development

WordPress Development

Q&A for WordPress developers and administrators

49k questions
64k answers
76% answered
42k users
39k visits/day
55 questions/day
4y1m site age
Theoretical Computer Science

Theoretical Computer Science

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

6.2k questions
10k answers
78% answered
18k users
1.9k visits/day
4.1 questions/day
4y1m site age
Ask Different

Ask Different

Q&A for power users of Apple hardware and software

44k questions
71k answers
74% answered
67k users
192k visits/day
48 questions/day
4y1m site age
Role-playing Games

Role-playing Games

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

9.2k questions
27k answers
100% answered
10k users
12k visits/day
14 questions/day
4y1m site age
Bicycles

Bicycles

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

5k questions
14k answers
98% answered
10k users
14k visits/day
5.3 questions/day
4y1m site age
Programmers

Programmers

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

33k questions
124k answers
97% answered
121k users
58k visits/day
31 questions/day
4y site age
Electrical Engineering

Electrical Engineering

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

34k questions
64k answers
92% answered
36k users
49k visits/day
53 questions/day
4y site age
Android Enthusiasts

Android Enthusiasts

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

24k questions
31k answers
67% answered
52k users
82k visits/day
27 questions/day
4y 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

4.3k questions
9.2k answers
98% answered
6.8k users
5.4k visits/day
3.9 questions/day
3y11m site age
Physics

Physics

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

40k questions
64k answers
85% answered
39k users
40k visits/day
63 questions/day
3y10m site age
Homebrewing

Homebrewing

Q&A for dedicated home brewers and serious enthusiasts

3.2k questions
7.9k answers
99% answered
4.2k users
4.2k visits/day
1.9 questions/day
3y10m site age
Information Security

Information Security

Q&A for Information security professionals

16k questions
36k answers
96% answered
44k users
39k visits/day
23 questions/day
3y10m site age
Writers

Writers

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

2.6k questions
7.8k answers
99% answered
7.4k users
3.4k visits/day
2.4 questions/day
3y10m site age
Video Production

Video Production

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

1.8k questions
2.7k answers
92% answered
5.6k users
1.9k visits/day
2.8 questions/day
3y9m site age
Graphic Design

Graphic Design

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

9.3k questions
18k answers
92% answered
22k users
48k visits/day
19 questions/day
3y8m 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

26k questions
36k answers
83% answered
39k users
77k visits/day
40 questions/day
3y8m site age
Science Fiction & Fantasy

Science Fiction & Fantasy

Q&A for science fiction and fantasy enthusiasts

16k questions
34k answers
95% answered
24k users
30k visits/day
18 questions/day
3y8m site age
Code Review

Code Review

Q&A for peer programmer code reviews

18k questions
31k answers
96% answered
47k users
28k visits/day
31 questions/day
3y8m site age
Programming Puzzles & Code Golf

Programming Puzzles & Code Golf

Q&A for programming puzzle enthusiasts and code golfers

2.5k questions
24k answers
98% answered
24k users
4.2k visits/day
5.1 questions/day
3y8m site age
Quantitative Finance

Quantitative Finance

Q&A for finance professionals and academics

3.3k questions
5.4k answers
80% answered
6.9k users
2.7k visits/day
4.3 questions/day
3y8m site age
Project Management

Project Management

Q&A for project managers

2.1k questions
7.8k answers
99% answered
9k users
2.4k visits/day
1.1 questions/day
3y7m site age
Skeptics

Skeptics

Q&A for scientific skepticism

5.1k questions
6.6k answers
86% answered
15k users
12k visits/day
4.0 questions/day
3y7m site age
Physical Fitness

Physical Fitness

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

4.1k questions
8.8k answers
96% answered
8.6k users
7k visits/day
2.9 questions/day
3y6m site age
Drupal Answers

Drupal Answers

Q&A for Drupal developers and administrators

43k questions
54k answers
69% answered
24k users
27k visits/day
45 questions/day
3y6m site age
Motor Vehicle Maintenance & Repair

Motor Vehicle Maintenance & Repair

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

3.6k questions
6.4k answers
91% answered
5.3k users
12k visits/day
4.5 questions/day
3y6m site age
Parenting

Parenting

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

2.5k questions
8.9k answers
99% answered
7k users
12k visits/day
2.0 questions/day
3y6m site age
SharePoint

SharePoint

Q&A for SharePoint enthusiasts

41k questions
53k answers
72% answered
21k users
49k visits/day
51 questions/day
3y5m site age
Musical Practice & Performance

Musical Practice & Performance

Q&A for musicians, students, and enthusiasts

4.2k questions
12k answers
99% answered
8.6k users
9.3k visits/day
7.0 questions/day
3y5m site age
Software Quality Assurance & Testing

Software Quality Assurance & Testing

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

2.2k questions
5.4k answers
89% answered
7.2k users
4.9k visits/day
2.6 questions/day
3y4m 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

12k questions
21k answers
87% answered
3.8k users
2.8k visits/day
11 questions/day
3y4m site age
German Language

German Language

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

3.7k questions
9.1k answers
100% answered
6.1k users
6k visits/day
3.5 questions/day
3y4m site age
Japanese Language

Japanese Language

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

4.9k questions
8.3k answers
99% answered
4.8k users
2.9k visits/day
4.0 questions/day
3y4m site age
Philosophy

Philosophy

Q&A for those interested in logical reasoning

3.2k questions
7.7k answers
93% answered
7.6k users
2.4k visits/day
6.4 questions/day
3y3m site age
Gardening & Landscaping

Gardening & Landscaping

Q&A for gardeners and landscapers

3.2k questions
5.6k answers
100% answered
3.8k users
3.6k visits/day
3.5 questions/day
3y3m site age
Travel

Travel

Q&A for road warriors and seasoned travelers

8.6k questions
16k answers
98% answered
13k users
21k visits/day
11 questions/day
3y3m site age
Personal Productivity

Personal Productivity

Q&A for people wanting to improve their personal productivity

1.6k questions
6.3k answers
100% answered
8.9k users
782 visits/day
1.0 questions/day
3y3m site age
Cryptography

Cryptography

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

4.9k questions
7.3k answers
92% answered
12k users
3.2k visits/day
7.4 questions/day
3y2m site age
Signal Processing

Signal Processing

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

5.2k questions
6.9k answers
79% answered
7.5k users
4.1k visits/day
6.1 questions/day
3y1m site age
French Language

French Language

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

2.4k questions
5.6k answers
100% answered
4.4k users
4.5k visits/day
2.1 questions/day
3y1m site age
Christianity

Christianity

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

5.8k questions
15k answers
99% answered
7.7k users
19k visits/day
6.3 questions/day
3y1m site age
Bitcoin

Bitcoin

Q&A for Bitcoin crypto-currency enthusiasts

7.7k questions
12k answers
87% answered
13k users
4.2k visits/day
5.3 questions/day
3y1m site age
Linguistics

Linguistics

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

2.2k questions
3.7k answers
82% answered
3.8k users
1.4k visits/day
2.6 questions/day
3y site age
Biblical Hermeneutics

Biblical Hermeneutics

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

2k questions
4.2k answers
97% answered
3k users
4.8k visits/day
1.6 questions/day
2y11m site age
History

History

Q&A for historians and history buffs

3.1k questions
6.1k answers
94% answered
5.2k users
3.1k visits/day
3.6 questions/day
2y11m site age
LEGO® Answers

LEGO® Answers

Q&A for LEGO® and building block enthusiasts

1k questions
1.9k answers
97% answered
2.7k users
1.5k visits/day
0.6 questions/day
2y11m site age
Spanish Language

Spanish Language

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

1.7k questions
4.3k answers
100% answered
3.4k users
4.6k visits/day
1.4 questions/day
2y10m site age
Computational Science

Computational Science

Q&A for scientists using computers to solve scientific problems

3.2k questions
5.2k answers
84% answered
6.9k users
1.8k visits/day
3.2 questions/day
2y10m site age
Movies & TV

Movies & TV

Q&A for movie and tv enthusiasts

5.7k questions
9k answers
94% answered
9.3k users
14k visits/day
7.7 questions/day
2y10m site age
Chinese Language

Chinese Language

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

1.8k questions
5k answers
100% answered
4k users
1.2k visits/day
3.8 questions/day
2y9m site age
Biology

Biology

Q&A for biology researchers, academics, and students

6k questions
7.7k answers
88% answered
6.5k users
7.7k visits/day
13 questions/day
2y9m site age
Poker

Poker

Q&A for serious players and enthusiasts of poker

513 questions
1.3k answers
99% answered
1.6k users
724 visits/day
0.5 questions/day
2y8m site age
Mathematica

Mathematica

Q&A for users of Mathematica

18k questions
29k answers
90% answered
14k users
7.8k visits/day
30 questions/day
2y8m site age
Cognitive Sciences

Cognitive Sciences

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

2.2k questions
2.7k answers
80% answered
4.3k users
1.1k visits/day
2.6 questions/day
2y8m site age
The Great Outdoors

The Great Outdoors

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

1.5k questions
3.6k answers
99% answered
2.8k users
2.4k visits/day
2.5 questions/day
2y8m site age
Martial Arts

Martial Arts

Q&A for students and teachers of all martial arts

622 questions
2.3k answers
99% answered
2k users
708 visits/day
0.4 questions/day
2y8m site age
Sports

Sports

Q&A for participants in team and individual sport activities

1.7k questions
2.7k answers
93% answered
2.9k users
2.6k visits/day
2.5 questions/day
2y7m site age
Academia

Academia

Q&A for academics and those enrolled in higher education

5.8k questions
15k answers
98% answered
16k users
10k visits/day
14 questions/day
2y7m site age
Computer Science

Computer Science

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

7.3k questions
10k answers
88% answered
17k users
4.6k visits/day
11 questions/day
2y6m site age
The Workplace

The Workplace

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

4.9k questions
17k answers
100% answered
18k users
19k visits/day
12 questions/day
2y5m site age
Windows Phone

Windows Phone

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

1.5k questions
2k answers
86% answered
4.1k users
1.8k visits/day
2.6 questions/day
2y5m site age
Chemistry

Chemistry

Q&A for scientists, academics, teachers and students

4.6k questions
6.2k answers
91% answered
5.3k users
7.9k visits/day
16 questions/day
2y5m site age
Chess

Chess

Q&A for serious players and enthusiasts of chess

1.3k questions
3.2k answers
97% answered
3.7k users
1.6k visits/day
2.0 questions/day
2y4m site age
Raspberry Pi

Raspberry Pi

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

5.3k questions
7.9k answers
77% answered
15k users
14k visits/day
7.5 questions/day
2y3m site age
Russian Language

Russian Language

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

948 questions
2.6k answers
100% answered
2.9k users
1.2k visits/day
0.6 questions/day
2y3m site age
Islam

Islam

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

3.1k questions
5.6k answers
85% answered
4.4k users
7.3k visits/day
4.8 questions/day
2y3m site age
Salesforce

Salesforce

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

16k questions
22k answers
83% answered
7.7k users
18k visits/day
38 questions/day
2y2m site age
Ask Patents

Ask Patents

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

1.4k questions
2.6k answers
75% answered
6.3k users
1.1k visits/day
2.1 questions/day
2y site age
Genealogy & Family History

Genealogy & Family History

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

853 questions
2k answers
98% answered
1.3k users
510 visits/day
0.6 questions/day
1y11m site age
Robotics

Robotics

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

1.2k questions
1.9k answers
86% answered
3.9k users
1.1k visits/day
2.3 questions/day
1y11m site age
ExpressionEngine® Answers

ExpressionEngine® Answers

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

8.4k questions
11k answers
82% answered
3.3k users
1.7k visits/day
9.0 questions/day
1y10m site age
Politics

Politics

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

1.3k questions
2k answers
87% answered
2.4k users
1.3k visits/day
2.1 questions/day
1y9m site age
Anime & Manga

Anime & Manga

Q&A for anime and manga fans

3.5k questions
4.9k answers
89% answered
4.8k users
6.9k visits/day
6.2 questions/day
1y9m site age
Magento

Magento

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

12k questions
15k answers
73% answered
8.8k users
18k visits/day
51 questions/day
1y8m site age
English Language Learners

English Language Learners

Q&A for speakers of other languages learning English

9.8k questions
17k answers
98% answered
8.9k users
18k visits/day
24 questions/day
1y8m site age
Sustainable Living

Sustainable Living

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

586 questions
1.2k answers
97% answered
1.6k users
432 visits/day
0.9 questions/day
1y8m site age
Tridion

Tridion

Q&A for Tridion developers and administrators

2.4k questions
4.1k answers
96% answered
1.1k users
905 visits/day
3.0 questions/day
1y7m 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

1.3k questions
2.2k answers
93% answered
4.3k users
1.9k visits/day
2.7 questions/day
1y6m site age
Network Engineering

Network Engineering

Q&A for network engineers

2.5k questions
4.1k answers
89% answered
6.7k users
8.1k visits/day
7.5 questions/day
1y4m site age
Open Data

Open Data

Q&A for developers and researchers interested in open data

742 questions
1.6k answers
93% answered
3.4k users
416 visits/day
1.9 questions/day
1y4m site age
Freelancing

Freelancing

Q&A for self-employed and freelance workers

539 questions
1.4k answers
97% answered
3.8k users
590 visits/day
1.3 questions/day
1y4m site age
Blender

Blender

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

4.5k questions
5.9k answers
89% answered
4.8k users
6.1k visits/day
14 questions/day
1y4m site age
MathOverflow

MathOverflow

Q&A for professional mathematicians

54k questions
92k answers
80% answered
37k users
16k visits/day
34 questions/day
5y site age
Space Exploration

Space Exploration

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

1.6k questions
2.6k answers
95% answered
3k users
1.2k visits/day
2.9 questions/day
1y2m site age
Sound Design

Sound Design

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

5.9k questions
19k answers
95% answered
4.4k users
3.6k visits/day
2.9 questions/day
3y10m site age
Astronomy

Astronomy

Q&A for astronomers and astrophysicists

1.1k questions
1.7k answers
94% answered
2.4k users
424 visits/day
3.0 questions/day
1y site age
Tor

Tor

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

1.2k questions
1.5k answers
79% answered
2.4k users
2.5k visits/day
3.7 questions/day
1y site age
Pets

Pets

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

1.4k questions
2.3k answers
94% answered
1.9k users
3.2k visits/day
2.4 questions/day
11m site age
Amateur Radio

Amateur Radio

Q&A for amateur radio enthusiasts

649 questions
1.1k answers
98% answered
1.5k users
452 visits/day
1.1 questions/day
11m site age
Italian Language

Italian Language

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

381 questions
779 answers
99% answered
853 users
248 visits/day
1.5 questions/day
10m site age
Stack Overflow em Português

Stack Overflow em Português

Q&A for programadores profissionais e entusiastas

9.4k questions
15k answers
89% answered
11k users
8k visits/day
44 questions/day
9m site age
Aviation

Aviation

Q&A for aircraft pilots, mechanics, and enthusiasts

1.6k questions
3.2k answers
99% answered
3.4k users
3.5k visits/day
3.3 questions/day
9m site age
Ebooks

Ebooks

Q&A for ebook publishers and readers

420 questions
720 answers
90% answered
1.6k users
667 visits/day
0.6 questions/day
9m site age
Beer

Beer

Q&A for beer aficionados and collectors

303 questions
617 answers
97% answered
1.3k users
380 visits/day
0.1 questions/day
8m site age
Software Recommendations

Software Recommendations

Q&A for people seeking specific software recommendations

2.9k questions
3.2k answers
58% answered
5.7k users
2.4k visits/day
10 questions/day
7m site age
Arduino

Arduino

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

1.1k questions
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