Stack Overflow

Stack Overflow

Q&A for professional and enthusiast programmers

8.9m questions
15m answers
74% answered
4m users
7.3m visits/day
7.9k questions/day
6y7m site age
Server Fault

Server Fault

Q&A for system and network administrators

190k questions
343k answers
82% answered
199k users
313k visits/day
110 questions/day
5y10m site age
Super User

Super User

Q&A for computer enthusiasts and power users

257k questions
403k answers
71% answered
311k users
639k visits/day
186 questions/day
5y7m site age
Meta Stack Exchange

Meta Stack Exchange

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

70k questions
111k answers
89% answered
122k users
8.5k visits/day
17 questions/day
5y8m site age
Web Applications

Web Applications

Q&A for power users of web applications

17k questions
25k answers
79% answered
52k users
46k visits/day
15 questions/day
4y8m site age
Arqade

Arqade

Q&A for passionate videogamers on all platforms

52k questions
89k answers
92% answered
62k users
275k visits/day
40 questions/day
4y7m site age
Webmasters

Webmasters

Q&A for pro webmasters

19k questions
33k answers
97% answered
35k users
12k visits/day
13 questions/day
4y7m site age
Seasoned Advice

Seasoned Advice

Q&A for professional and amateur chefs

12k questions
30k answers
98% answered
22k users
93k visits/day
9.2 questions/day
4y7m site age
Game Development

Game Development

Q&A for professional and independent game developers

25k questions
43k answers
91% answered
46k users
24k visits/day
26 questions/day
4y7m site age
Photography

Photography

Q&A for professional, enthusiast and amateur photographers

13k questions
34k answers
98% answered
24k users
26k visits/day
9.2 questions/day
4y7m site age
Cross Validated

Cross Validated

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

52k questions
55k answers
65% answered
50k users
49k visits/day
77 questions/day
4y7m site age
Mathematics

Mathematics

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

403k questions
589k answers
79% answered
171k users
128k visits/day
591 questions/day
4y7m site age
Home Improvement

Home Improvement

Q&A for contractors and serious DIYers

15k questions
28k answers
88% answered
21k users
74k visits/day
21 questions/day
4y7m site age
Geographic Information Systems

Geographic Information Systems

Q&A for cartographers, geographers and GIS professionals

46k questions
59k answers
75% answered
34k users
35k visits/day
57 questions/day
4y7m site age
TeX - LaTeX

TeX - LaTeX

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

82k questions
112k answers
93% answered
58k users
72k visits/day
79 questions/day
4y7m site age
Ask Ubuntu

Ask Ubuntu

Q&A for Ubuntu users and developers

182k questions
237k answers
67% answered
251k users
412k visits/day
184 questions/day
4y7m site age
Personal Finance & Money

Personal Finance & Money

Q&A for people who want to be financially literate

9.7k questions
20k answers
95% answered
17k users
19k visits/day
14 questions/day
4y6m site age
English Language & Usage

English Language & Usage

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

49k questions
128k answers
98% answered
78k users
251k visits/day
55 questions/day
4y6m site age
Stack Apps

Stack Apps

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

1.9k questions
2k answers
64% answered
19k users
504 visits/day
1.1 questions/day
4y11m site age
User Experience

User Experience

Q&A for user experience researchers and experts

15k questions
44k answers
97% answered
46k users
14k visits/day
14 questions/day
4y6m site age
Unix & Linux

Unix & Linux

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

59k questions
94k answers
80% answered
88k users
186k visits/day
73 questions/day
4y6m site age
WordPress Development

WordPress Development

Q&A for WordPress developers and administrators

54k questions
69k answers
74% answered
47k users
39k visits/day
57 questions/day
4y6m site age
Theoretical Computer Science

Theoretical Computer Science

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

6.7k questions
11k answers
78% answered
20k users
2k visits/day
4.8 questions/day
4y6m site age
Ask Different

Ask Different

Q&A for power users of Apple hardware and software

53k questions
81k answers
71% answered
85k users
229k visits/day
54 questions/day
4y6m site age
Role-playing Games

Role-playing Games

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

11k questions
31k answers
100% answered
12k users
15k visits/day
14 questions/day
4y6m site age
Bicycles

Bicycles

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

5.6k questions
16k answers
97% answered
12k users
14k visits/day
4.2 questions/day
4y6m site age
Programmers

Programmers

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

35k questions
128k answers
96% answered
136k users
70k visits/day
36 questions/day
4y5m site age
Electrical Engineering

Electrical Engineering

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

41k questions
77k answers
90% answered
45k users
64k visits/day
65 questions/day
4y5m site age
Android Enthusiasts

Android Enthusiasts

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

28k questions
35k answers
64% answered
68k users
149k visits/day
42 questions/day
4y5m 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

5k questions
10k answers
98% answered
8.1k users
9.4k visits/day
3.9 questions/day
4y4m site age
Physics

Physics

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

49k questions
77k answers
84% answered
48k users
55k visits/day
74 questions/day
4y3m site age
Homebrewing

Homebrewing

Q&A for dedicated home brewers and serious enthusiasts

3.5k questions
8.4k answers
99% answered
4.8k users
5.3k visits/day
1.9 questions/day
4y3m site age
Information Security

Information Security

Q&A for Information security professionals

20k questions
42k answers
95% answered
53k users
48k visits/day
28 questions/day
4y3m site age
Writers

Writers

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

2.9k questions
8.6k answers
99% answered
8.6k users
4.3k visits/day
2.4 questions/day
4y3m site age
Video Production

Video Production

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

2.3k questions
3.4k answers
90% answered
6.4k users
2.7k visits/day
4.3 questions/day
4y2m site age
Graphic Design

Graphic Design

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

11k questions
21k answers
90% answered
28k users
54k visits/day
20 questions/day
4y1m 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

31k questions
42k answers
81% answered
47k users
84k visits/day
38 questions/day
4y1m site age
Science Fiction & Fantasy

Science Fiction & Fantasy

Q&A for science fiction and fantasy enthusiasts

19k questions
40k answers
95% answered
30k users
46k visits/day
22 questions/day
4y1m site age
Code Review

Code Review

Q&A for peer programmer code reviews

22k questions
38k answers
95% answered
57k users
39k visits/day
35 questions/day
4y1m site age
Programming Puzzles & Code Golf

Programming Puzzles & Code Golf

Q&A for programming puzzle enthusiasts and code golfers

3k questions
29k answers
98% answered
27k users
4.2k visits/day
4.0 questions/day
4y1m site age
Quantitative Finance

Quantitative Finance

Q&A for finance professionals and academics

4.1k questions
6.4k answers
78% answered
8.1k users
3.3k visits/day
6.5 questions/day
4y1m site age
Project Management

Project Management

Q&A for project managers

2.4k questions
8.4k answers
98% answered
10k users
3.4k visits/day
2.9 questions/day
4y site age
Skeptics

Skeptics

Q&A for scientific skepticism

5.5k questions
7k answers
85% answered
16k users
13k visits/day
2.5 questions/day
4y site age
Physical Fitness

Physical Fitness

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

4.6k questions
9.7k answers
96% answered
9.7k users
10k visits/day
4.6 questions/day
3y11m site age
Drupal Answers

Drupal Answers

Q&A for Drupal developers and administrators

48k questions
61k answers
69% answered
27k users
28k visits/day
45 questions/day
3y11m site age
Motor Vehicle Maintenance & Repair

Motor Vehicle Maintenance & Repair

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

4.4k questions
7.5k answers
89% answered
6.7k users
24k visits/day
6.2 questions/day
3y11m site age
Parenting

Parenting

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

2.9k questions
10k answers
100% answered
8.8k users
16k visits/day
2.6 questions/day
3y11m site age
SharePoint

SharePoint

Q&A for SharePoint enthusiasts

47k questions
59k answers
69% answered
24k users
48k visits/day
51 questions/day
3y10m site age
Music: Practice & Theory

Music: Practice & Theory

Q&A for musicians, students, and enthusiasts

5.2k questions
15k answers
99% answered
11k users
16k visits/day
7.4 questions/day
3y10m site age
Software Quality Assurance & Testing

Software Quality Assurance & Testing

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

2.6k questions
6.3k answers
86% answered
8.4k users
5.5k visits/day
3.7 questions/day
3y9m 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

14k questions
25k answers
87% answered
4.5k users
4k visits/day
27 questions/day
3y9m site age
German Language

German Language

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

4.6k questions
11k answers
100% answered
7.5k users
6.9k visits/day
3.9 questions/day
3y9m site age
Japanese Language

Japanese Language

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

5.7k questions
9.5k answers
99% answered
5.8k users
3.5k visits/day
5.1 questions/day
3y9m site age
Philosophy

Philosophy

Q&A for those interested in logical reasoning

3.9k questions
9.6k answers
92% answered
9.1k users
2.7k visits/day
4.9 questions/day
3y8m site age
Gardening & Landscaping

Gardening & Landscaping

Q&A for gardeners and landscapers

3.6k questions
6.4k answers
99% answered
4.3k users
3.6k visits/day
2.6 questions/day
3y8m site age
Travel

Travel

Q&A for road warriors and seasoned travelers

10k questions
19k answers
99% answered
17k users
21k visits/day
15 questions/day
3y8m site age
Personal Productivity

Personal Productivity

Q&A for people wanting to improve their personal productivity

1.8k questions
6.7k answers
100% answered
9.8k users
1.5k visits/day
0.9 questions/day
3y8m site age
Cryptography

Cryptography

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

6k questions
8.5k answers
89% answered
14k users
4.5k visits/day
7.6 questions/day
3y7m site age
Signal Processing

Signal Processing

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

6.1k questions
8k answers
76% answered
9k users
5.3k visits/day
9.1 questions/day
3y6m site age
French Language

French Language

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

2.7k questions
6.4k answers
100% answered
5.3k users
5.7k visits/day
2.9 questions/day
3y6m site age
Christianity

Christianity

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

6.6k questions
17k answers
99% answered
9.3k users
22k visits/day
6.4 questions/day
3y6m site age
Bitcoin

Bitcoin

Q&A for Bitcoin crypto-currency enthusiasts

8.4k questions
13k answers
90% answered
14k users
5.4k visits/day
5.7 questions/day
3y6m site age
Linguistics

Linguistics

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

2.7k questions
4.5k answers
82% answered
4.8k users
1.9k visits/day
3.9 questions/day
3y5m site age
Biblical Hermeneutics

Biblical Hermeneutics

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

2.4k questions
4.9k answers
96% answered
3.6k users
6.2k visits/day
2.9 questions/day
3y4m site age
History

History

Q&A for historians and history buffs

3.8k questions
7.3k answers
94% answered
6.7k users
7k visits/day
5.2 questions/day
3y4m site age
LEGO® Answers

LEGO® Answers

Q&A for LEGO® and building block enthusiasts

1.2k questions
2.2k answers
96% answered
3.1k users
2.1k visits/day
1.7 questions/day
3y4m site age
Spanish Language

Spanish Language

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

2.1k questions
5.2k answers
100% answered
4.2k users
5.4k visits/day
2.2 questions/day
3y3m site age
Computational Science

Computational Science

Q&A for scientists using computers to solve scientific problems

3.7k questions
5.8k answers
83% answered
8.2k users
2.3k visits/day
3.5 questions/day
3y3m site age
Movies & TV

Movies & TV

Q&A for movie and tv enthusiasts

7.3k questions
11k answers
93% answered
12k users
25k visits/day
14 questions/day
3y3m site age
Chinese Language

Chinese Language

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

2.3k questions
6.3k answers
99% answered
5k users
1.3k visits/day
2.6 questions/day
3y2m site age
Biology

Biology

Q&A for biology researchers, academics, and students

7.3k questions
9.6k answers
91% answered
8.5k users
9k visits/day
14 questions/day
3y2m site age
Poker

Poker

Q&A for serious players and enthusiasts of poker

633 questions
1.6k answers
98% answered
1.9k users
1k visits/day
0.6 questions/day
3y1m site age
Mathematica

Mathematica

Q&A for users of Mathematica

22k questions
34k answers
88% answered
17k users
8.5k visits/day
33 questions/day
3y1m site age
Cognitive Sciences

Cognitive Sciences

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

2.6k questions
3.2k answers
78% answered
5.2k users
1.6k visits/day
3.4 questions/day
3y1m site age
The Great Outdoors

The Great Outdoors

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

1.8k questions
4.3k answers
99% answered
3.4k users
3.3k visits/day
1.3 questions/day
3y1m site age
Martial Arts

Martial Arts

Q&A for students and teachers of all martial arts

710 questions
2.6k answers
98% answered
2.5k users
1.5k visits/day
0.6 questions/day
3y1m site age
Sports

Sports

Q&A for participants in team and individual sport activities

2k questions
3.2k answers
93% answered
3.5k users
4.8k visits/day
1.5 questions/day
3y site age
Academia

Academia

Q&A for academics and those enrolled in higher education

8k questions
20k answers
98% answered
22k users
16k visits/day
17 questions/day
3y site age
Computer Science

Computer Science

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

9.2k questions
12k answers
87% answered
22k users
5.7k visits/day
16 questions/day
2y11m site age
The Workplace

The Workplace

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

6.3k questions
21k answers
100% answered
21k users
20k visits/day
11 questions/day
2y10m site age
Windows Phone

Windows Phone

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

1.8k questions
2.5k answers
86% answered
5k users
6.1k visits/day
3.2 questions/day
2y10m site age
Chemistry

Chemistry

Q&A for scientists, academics, teachers and students

6.8k questions
9.2k answers
91% answered
7.7k users
14k visits/day
19 questions/day
2y10m site age
Chess

Chess

Q&A for serious players and enthusiasts of chess

1.7k questions
4k answers
97% answered
4.7k users
2.1k visits/day
2.2 questions/day
2y9m site age
Raspberry Pi

Raspberry Pi

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

6.6k questions
9.5k answers
81% answered
18k users
24k visits/day
14 questions/day
2y8m site age
Russian Language

Russian Language

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

1.2k questions
3.3k answers
100% answered
3.6k users
910 visits/day
1.4 questions/day
2y8m site age
Islam

Islam

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

3.6k questions
6.4k answers
84% answered
5.2k users
7.8k visits/day
5.2 questions/day
2y8m site age
Salesforce

Salesforce

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

22k questions
29k answers
78% answered
11k users
20k visits/day
47 questions/day
2y7m site age
Ask Patents

Ask Patents

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

1.7k questions
3k answers
77% answered
6.9k users
1.2k visits/day
3.3 questions/day
2y5m site age
Genealogy & Family History

Genealogy & Family History

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

1k questions
2.2k answers
96% answered
1.6k users
680 visits/day
0.5 questions/day
2y4m site age
Robotics

Robotics

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

1.5k questions
2.5k answers
86% answered
4.9k users
1.6k visits/day
3.0 questions/day
2y4m site age
ExpressionEngine® Answers

ExpressionEngine® Answers

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

9.4k questions
12k answers
80% answered
3.6k users
1.6k visits/day
9.6 questions/day
2y3m site age
Politics

Politics

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

1.5k questions
2.5k answers
88% answered
3.1k users
1.7k visits/day
1.6 questions/day
2y2m site age
Anime & Manga

Anime & Manga

Q&A for anime and manga fans

4.8k questions
6.5k answers
87% answered
6.8k users
13k visits/day
9.6 questions/day
2y2m site age
Magento

Magento

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

18k questions
22k answers
76% answered
14k users
23k visits/day
59 questions/day
2y1m site age
English Language Learners

English Language Learners

Q&A for speakers of other languages learning English

14k questions
25k answers
98% answered
13k users
23k visits/day
26 questions/day
2y1m site age
Sustainable Living

Sustainable Living

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

679 questions
1.4k answers
97% answered
1.9k users
1.1k visits/day
0.5 questions/day
2y1m site age
Tridion

Tridion

Q&A for Tridion developers and administrators

2.9k questions
4.9k answers
96% answered
1.2k users
858 visits/day
4.2 questions/day
2y 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

1.7k questions
2.7k answers
90% answered
5.5k users
2.5k visits/day
3.5 questions/day
1y11m site age
Network Engineering

Network Engineering

Q&A for network engineers

3.3k questions
5.1k answers
86% answered
9k users
8.7k visits/day
9.4 questions/day
1y9m site age
Open Data

Open Data

Q&A for developers and researchers interested in open data

1.1k questions
2.1k answers
88% answered
4.6k users
1k visits/day
3.4 questions/day
1y9m site age
Freelancing

Freelancing

Q&A for self-employed and freelance workers

682 questions
1.7k answers
97% answered
5k users
721 visits/day
1.4 questions/day
1y9m site age
Blender

Blender

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

7.2k questions
8.8k answers
89% answered
7.2k users
9.3k visits/day
22 questions/day
1y9m site age
MathOverflow

MathOverflow

Q&A for professional mathematicians

58k questions
97k answers
79% answered
41k users
20k visits/day
40 questions/day
5y5m site age
Space Exploration

Space Exploration

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

2.2k questions
3.6k answers
94% answered
4.4k users
2.5k visits/day
3.3 questions/day
1y7m site age
Sound Design

Sound Design

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

6.3k questions
20k answers
94% answered
5.3k users
4.4k visits/day
3.0 questions/day
4y3m site age
Astronomy

Astronomy

Q&A for astronomers and astrophysicists

1.6k questions
2.6k answers
95% answered
3.5k users
960 visits/day
3.6 questions/day
1y5m site age
Tor

Tor

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

1.6k questions
2k answers
80% answered
3.4k users
3.1k visits/day
3.4 questions/day
1y5m site age
Pets

Pets

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

1.8k questions
2.9k answers
92% answered
2.5k users
5.8k visits/day
3.2 questions/day
1y4m site age
Amateur Radio

Amateur Radio

Q&A for amateur radio enthusiasts

798 questions
1.4k answers
98% answered
2.2k users
656 visits/day
0.9 questions/day
1y4m site age
Italian Language

Italian Language

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

664 questions
1.3k answers
99% answered
1.2k users
578 visits/day
2.3 questions/day
1y3m site age
Stack Overflow em Português

Stack Overflow em Português

Q&A for programadores profissionais e entusiastas

16k questions
24k answers
89% answered
14k users
11k visits/day
51 questions/day
1y2m site age
Aviation

Aviation

Q&A for aircraft pilots, mechanics, and enthusiasts

2.4k questions
5.2k answers
99% answered
5.1k users
7.5k visits/day
5.4 questions/day
1y2m site age
Ebooks

Ebooks

Q&A for ebook publishers and readers

511 questions
874 answers
88% answered
2.2k users
1.1k visits/day
0.5 questions/day
1y2m site age
Beer

Beer

Q&A for beer aficionados and collectors

350 questions
785 answers
97% answered
1.8k users
1.2k visits/day
0.1 questions/day
1y1m site age
Software Recommendations

Software Recommendations

Q&A for people seeking specific software recommendations

4.5k questions
4.8k answers
58% answered
8.5k users
4.3k visits/day
12 questions/day
1y site age
Arduino

Arduino

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

2.2k questions
3k answers
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