Stack Overflow

Stack Overflow

Q&A for professional and enthusiast programmers

9.4m questions
16m answers
74% answered
4.2m users
7.3m visits/day
8k questions/day
6y10m site age
Server Fault

Server Fault

Q&A for system and network administrators

195k questions
348k answers
82% answered
209k users
336k visits/day
104 questions/day
6y1m site age
Super User

Super User

Q&A for computer enthusiasts and power users

264k questions
413k answers
71% answered
326k users
649k visits/day
171 questions/day
5y10m site age
Meta Stack Exchange

Meta Stack Exchange

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

72k questions
112k answers
88% answered
126k users
8.7k visits/day
27 questions/day
5y11m site age
Web Applications

Web Applications

Q&A for power users of web applications

17k questions
25k answers
79% answered
55k users
44k visits/day
12 questions/day
4y11m site age
Arqade

Arqade

Q&A for passionate videogamers on all platforms

54k questions
92k answers
92% answered
66k users
267k visits/day
33 questions/day
4y10m site age
Webmasters

Webmasters

Q&A for pro webmasters

20k questions
34k answers
96% answered
37k users
12k visits/day
15 questions/day
4y10m site age
Seasoned Advice

Seasoned Advice

Q&A for professional and amateur chefs

12k questions
32k answers
98% answered
23k users
80k visits/day
7.1 questions/day
4y10m site age
Game Development

Game Development

Q&A for professional and independent game developers

26k questions
45k answers
90% answered
49k users
24k visits/day
23 questions/day
4y10m site age
Photography

Photography

Q&A for professional, enthusiast and amateur photographers

13k questions
35k answers
97% answered
25k users
27k visits/day
9.3 questions/day
4y10m site age
Cross Validated

Cross Validated

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

56k questions
59k answers
64% answered
55k users
61k visits/day
88 questions/day
4y10m site age
Mathematics

Mathematics

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

434k questions
634k answers
79% answered
183k users
131k visits/day
637 questions/day
4y10m site age
Home Improvement

Home Improvement

Q&A for contractors and serious DIYers

16k questions
30k answers
87% answered
23k users
68k visits/day
18 questions/day
4y10m site age
Geographic Information Systems

Geographic Information Systems

Q&A for cartographers, geographers and GIS professionals

50k questions
63k answers
74% answered
37k users
41k visits/day
61 questions/day
4y10m site age
TeX - LaTeX

TeX - LaTeX

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

87k questions
118k answers
93% answered
61k users
78k visits/day
77 questions/day
4y10m site age
Ask Ubuntu

Ask Ubuntu

Q&A for Ubuntu users and developers

188k questions
247k answers
68% answered
263k users
415k visits/day
214 questions/day
4y10m site age
Personal Finance & Money

Personal Finance & Money

Q&A for people who want to be financially literate

11k questions
21k answers
95% answered
18k users
18k visits/day
13 questions/day
4y9m site age
English Language & Usage

English Language & Usage

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

52k questions
134k answers
98% answered
83k users
285k visits/day
57 questions/day
4y9m site age
Stack Apps

Stack Apps

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

1.9k questions
2.1k answers
64% answered
20k users
567 visits/day
1.4 questions/day
5y2m site age
User Experience

User Experience

Q&A for user experience researchers and experts

16k questions
46k answers
97% answered
49k users
15k visits/day
14 questions/day
4y9m site age
Unix & Linux

Unix & Linux

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

64k questions
101k answers
79% answered
96k users
200k visits/day
84 questions/day
4y9m site age
WordPress Development

WordPress Development

Q&A for WordPress developers and administrators

56k questions
72k answers
74% answered
50k users
40k visits/day
52 questions/day
4y9m site age
Theoretical Computer Science

Theoretical Computer Science

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

6.9k questions
11k answers
78% answered
21k users
2.1k visits/day
4.6 questions/day
4y9m site age
Ask Different

Ask Different

Q&A for power users of Apple hardware and software

56k questions
85k answers
70% answered
91k users
241k visits/day
53 questions/day
4y9m site age
Role-playing Games

Role-playing Games

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

12k questions
33k answers
100% answered
13k users
15k visits/day
15 questions/day
4y9m site age
Bicycles

Bicycles

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

6k questions
17k answers
97% answered
13k users
21k visits/day
5.6 questions/day
4y9m site age
Programmers

Programmers

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

36k questions
129k answers
96% answered
143k users
71k visits/day
30 questions/day
4y8m site age
Electrical Engineering

Electrical Engineering

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

45k questions
82k answers
89% answered
49k users
68k visits/day
60 questions/day
4y8m site age
Android Enthusiasts

Android Enthusiasts

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

30k questions
36k answers
62% answered
74k users
159k visits/day
42 questions/day
4y8m 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

5.2k questions
11k answers
98% answered
8.6k users
8.8k visits/day
4.1 questions/day
4y7m site age
Physics

Physics

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

53k questions
83k answers
83% answered
53k users
56k visits/day
77 questions/day
4y6m site age
Homebrewing

Homebrewing

Q&A for dedicated home brewers and serious enthusiasts

3.7k questions
8.7k answers
99% answered
5.1k users
4.8k visits/day
1.8 questions/day
4y6m site age
Information Security

Information Security

Q&A for Information security professionals

21k questions
44k answers
95% answered
57k users
50k visits/day
24 questions/day
4y6m site age
Writers

Writers

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

3.1k questions
9.1k answers
99% answered
9.1k users
4.6k visits/day
2.6 questions/day
4y6m site age
Video Production

Video Production

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

2.5k questions
3.7k answers
89% answered
6.8k users
2.9k visits/day
3.1 questions/day
4y5m site age
Graphic Design

Graphic Design

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

12k questions
23k answers
91% answered
31k users
61k visits/day
17 questions/day
4y4m 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

33k questions
44k answers
80% answered
51k users
89k visits/day
39 questions/day
4y4m site age
Science Fiction & Fantasy

Science Fiction & Fantasy

Q&A for science fiction and fantasy enthusiasts

21k questions
43k answers
95% answered
32k users
64k visits/day
27 questions/day
4y4m site age
Code Review

Code Review

Q&A for peer programmer code reviews

24k questions
41k answers
94% answered
61k users
41k visits/day
33 questions/day
4y4m site age
Programming Puzzles & Code Golf

Programming Puzzles & Code Golf

Q&A for programming puzzle enthusiasts and code golfers

3.3k questions
31k answers
98% answered
28k users
3.4k visits/day
4.3 questions/day
4y4m site age
Quantitative Finance

Quantitative Finance

Q&A for finance professionals and academics

4.4k questions
6.8k answers
79% answered
8.7k users
3.9k visits/day
6.6 questions/day
4y4m site age
Project Management

Project Management

Q&A for project managers

2.4k questions
8.7k answers
99% answered
11k users
3.5k visits/day
2.0 questions/day
4y3m site age
Skeptics

Skeptics

Q&A for scientific skepticism

5.7k questions
7.2k answers
85% answered
17k users
13k visits/day
4.4 questions/day
4y3m site age
Physical Fitness

Physical Fitness

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

4.8k questions
10k answers
97% answered
10k users
11k visits/day
3.3 questions/day
4y2m site age
Drupal Answers

Drupal Answers

Q&A for Drupal developers and administrators

50k questions
64k answers
68% answered
29k users
27k visits/day
42 questions/day
4y2m site age
Motor Vehicle Maintenance & Repair

Motor Vehicle Maintenance & Repair

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

4.8k questions
8k answers
88% answered
7.3k users
24k visits/day
5.8 questions/day
4y2m site age
Parenting

Parenting

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

3.1k questions
11k answers
99% answered
9.9k users
17k visits/day
3.1 questions/day
4y2m site age
SharePoint

SharePoint

Q&A for SharePoint enthusiasts

50k questions
63k answers
68% answered
26k users
48k visits/day
51 questions/day
4y1m site age
Music: Practice & Theory

Music: Practice & Theory

Q&A for musicians, students, and enthusiasts

5.6k questions
16k answers
99% answered
12k users
15k visits/day
6.4 questions/day
4y1m site age
Software Quality Assurance & Testing

Software Quality Assurance & Testing

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

2.8k questions
6.6k answers
89% answered
9k users
6.1k visits/day
3.2 questions/day
4y 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

15k questions
26k answers
86% answered
4.7k users
3.1k visits/day
11 questions/day
4y site age
German Language

German Language

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

4.8k questions
12k answers
100% answered
8k users
6.2k visits/day
3.3 questions/day
4y site age
Japanese Language

Japanese Language

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

6.1k questions
10k answers
99% answered
6.2k users
3.5k visits/day
7.0 questions/day
4y site age
Philosophy

Philosophy

Q&A for those interested in logical reasoning

4.3k questions
10k answers
92% answered
9.7k users
2.9k visits/day
8.6 questions/day
3y11m site age
Gardening & Landscaping

Gardening & Landscaping

Q&A for gardeners and landscapers

3.9k questions
6.8k answers
99% answered
4.6k users
9k visits/day
4.8 questions/day
3y11m site age
Travel

Travel

Q&A for road warriors and seasoned travelers

11k questions
20k answers
99% answered
18k users
25k visits/day
18 questions/day
3y11m site age
Personal Productivity

Personal Productivity

Q&A for people wanting to improve their personal productivity

1.8k questions
6.9k answers
100% answered
10k users
1.6k visits/day
0.8 questions/day
3y11m site age
Cryptography

Cryptography

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

6.5k questions
9.1k answers
89% answered
15k users
5.1k visits/day
10 questions/day
3y10m site age
Signal Processing

Signal Processing

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

6.7k questions
8.7k answers
76% answered
9.8k users
6.1k visits/day
9.9 questions/day
3y9m site age
French Language

French Language

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

2.8k questions
6.7k answers
100% answered
5.7k users
5.5k visits/day
2.0 questions/day
3y9m site age
Christianity

Christianity

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

6.8k questions
18k answers
99% answered
9.9k users
21k visits/day
5.3 questions/day
3y9m site age
Bitcoin

Bitcoin

Q&A for Bitcoin crypto-currency enthusiasts

8.7k questions
14k answers
90% answered
15k users
4.7k visits/day
5.6 questions/day
3y9m site age
Linguistics

Linguistics

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

2.9k questions
4.9k answers
81% answered
5.1k users
1.9k visits/day
4.1 questions/day
3y8m site age
Biblical Hermeneutics

Biblical Hermeneutics

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

2.5k questions
5.1k answers
95% answered
3.9k users
6k visits/day
2.4 questions/day
3y7m site age
History

History

Q&A for historians and history buffs

4k questions
7.9k answers
94% answered
7.4k users
7.3k visits/day
3.8 questions/day
3y7m site age
LEGO® Answers

LEGO® Answers

Q&A for LEGO® and building block enthusiasts

1.2k questions
2.3k answers
96% answered
3.3k users
1.9k visits/day
1.3 questions/day
3y7m site age
Spanish Language

Spanish Language

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

2.2k questions
5.5k answers
100% answered
4.6k users
5.9k visits/day
1.9 questions/day
3y6m site age
Computational Science

Computational Science

Q&A for scientists using computers to solve scientific problems

4k questions
6k answers
82% answered
8.8k users
2.4k visits/day
4.9 questions/day
3y6m site age
Movies & TV

Movies & TV

Q&A for movie and tv enthusiasts

7.7k questions
12k answers
94% answered
14k users
27k visits/day
11 questions/day
3y6m site age
Chinese Language

Chinese Language

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

2.5k questions
6.8k answers
99% answered
5.4k users
1.4k visits/day
3.4 questions/day
3y5m site age
Biology

Biology

Q&A for biology researchers, academics, and students

8k questions
10k answers
90% answered
9.3k users
10k visits/day
13 questions/day
3y5m site age
Poker

Poker

Q&A for serious players and enthusiasts of poker

686 questions
1.7k answers
97% answered
2.1k users
1k visits/day
0.6 questions/day
3y4m site age
Mathematica

Mathematica

Q&A for users of Mathematica

24k questions
37k answers
88% answered
18k users
8.7k visits/day
34 questions/day
3y4m site age
Cognitive Sciences

Cognitive Sciences

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

2.7k questions
3.4k answers
85% answered
5.7k users
1.7k visits/day
3.9 questions/day
3y4m site age
The Great Outdoors

The Great Outdoors

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

1.9k questions
4.5k answers
99% answered
3.7k users
3.7k visits/day
1.3 questions/day
3y4m site age
Martial Arts

Martial Arts

Q&A for students and teachers of all martial arts

745 questions
2.7k answers
99% answered
2.6k users
1.7k visits/day
0.1 questions/day
3y4m site age
Sports

Sports

Q&A for participants in team and individual sport activities

2.1k questions
3.5k answers
94% answered
3.8k users
5.3k visits/day
1.9 questions/day
3y3m site age
Academia

Academia

Q&A for academics and those enrolled in higher education

9k questions
22k answers
99% answered
25k users
17k visits/day
18 questions/day
3y3m site age
Computer Science

Computer Science

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

10k questions
13k answers
87% answered
24k users
6.8k visits/day
17 questions/day
3y2m site age
The Workplace

The Workplace

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

7k questions
23k answers
100% answered
23k users
27k visits/day
13 questions/day
3y1m site age
Windows Phone

Windows Phone

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

2k questions
2.7k answers
86% answered
5.5k users
6.5k visits/day
2.1 questions/day
3y1m site age
Chemistry

Chemistry

Q&A for scientists, academics, teachers and students

8.1k questions
11k answers
90% answered
8.9k users
16k visits/day
24 questions/day
3y1m site age
Chess

Chess

Q&A for serious players and enthusiasts of chess

1.8k questions
4.3k answers
96% answered
5k users
2k visits/day
2.1 questions/day
3y site age
Raspberry Pi

Raspberry Pi

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

7.3k questions
11k answers
80% answered
20k users
21k visits/day
14 questions/day
2y11m 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
3.5k answers
100% answered
3.9k users
832 visits/day
2.2 questions/day
2y11m site age
Islam

Islam

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

3.7k questions
6.8k answers
85% answered
5.6k users
8.4k visits/day
3.2 questions/day
2y11m site age
Salesforce

Salesforce

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

25k questions
32k answers
77% answered
12k users
21k visits/day
39 questions/day
2y10m 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
7.3k users
1.3k visits/day
3.0 questions/day
2y8m site age
Genealogy & Family History

Genealogy & Family History

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

1.1k questions
2.4k answers
95% answered
1.7k users
731 visits/day
1.4 questions/day
2y7m site age
Robotics

Robotics

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

1.7k questions
2.8k answers
86% answered
5.4k users
1.6k visits/day
2.8 questions/day
2y7m site age
ExpressionEngine® Answers

ExpressionEngine® Answers

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

9.8k questions
12k answers
80% answered
3.8k users
1.5k visits/day
5.6 questions/day
2y6m site age
Politics

Politics

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

1.6k questions
2.7k answers
88% answered
3.3k users
1.9k visits/day
1.7 questions/day
2y5m site age
Anime & Manga

Anime & Manga

Q&A for anime and manga fans

5.3k questions
7.2k answers
87% answered
7.9k users
16k visits/day
8.9 questions/day
2y5m site age
Magento

Magento

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

20k questions
25k answers
82% answered
15k users
25k visits/day
46 questions/day
2y4m site age
English Language Learners

English Language Learners

Q&A for speakers of other languages learning English

15k questions
28k answers
98% answered
14k users
26k visits/day
20 questions/day
2y4m site age
Sustainable Living

Sustainable Living

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

713 questions
1.4k answers
97% answered
2.1k users
954 visits/day
0.6 questions/day
2y4m site age
Tridion

Tridion

Q&A for Tridion developers and administrators

3.1k questions
5.2k answers
95% answered
1.3k users
772 visits/day
3.1 questions/day
2y3m 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

1.9k questions
2.9k answers
89% answered
6.1k users
2.5k visits/day
2.7 questions/day
2y2m site age
Network Engineering

Network Engineering

Q&A for network engineers

3.6k questions
5.6k answers
86% answered
10k users
9.8k visits/day
8.1 questions/day
2y site age
Open Data

Open Data

Q&A for developers and researchers interested in open data

1.3k questions
2.4k answers
88% answered
5.1k users
1.2k visits/day
2.0 questions/day
2y site age
Freelancing

Freelancing

Q&A for self-employed and freelance workers

747 questions
1.9k answers
97% answered
5.4k users
798 visits/day
0.9 questions/day
2y site age
Blender

Blender

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

8.6k questions
10k answers
88% answered
8.4k users
10k visits/day
24 questions/day
2y site age
MathOverflow

MathOverflow

Q&A for professional mathematicians

60k questions
99k answers
79% answered
44k users
20k visits/day
42 questions/day
5y8m site age
Space Exploration

Space Exploration

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

2.4k questions
4k answers
94% answered
4.8k users
2.8k visits/day
3.9 questions/day
1y10m site age
Sound Design

Sound Design

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

6.4k questions
20k answers
94% answered
5.6k users
4.4k visits/day
2.0 questions/day
4y6m site age
Astronomy

Astronomy

Q&A for astronomers and astrophysicists

1.9k questions
2.9k answers
92% answered
4k users
1.1k visits/day
2.8 questions/day
1y8m site age
Tor

Tor

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

1.8k questions
2.2k answers
81% answered
3.8k users
3.1k visits/day
2.3 questions/day
1y8m site age
Pets

Pets

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

2k questions
3.1k answers
92% answered
2.8k users
6.7k visits/day
2.6 questions/day
1y7m site age
Amateur Radio

Amateur Radio

Q&A for amateur radio enthusiasts

870 questions
1.5k answers
97% answered
2.5k users
707 visits/day
1.0 questions/day
1y7m site age
Italian Language

Italian Language

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

758 questions
1.4k answers
99% answered
1.4k users
760 visits/day
1.6 questions/day
1y6m site age
Stack Overflow em Português

Stack Overflow em Português

Q&A for programadores profissionais e entusiastas

19k questions
28k answers
86% answered
16k users
17k visits/day
62 questions/day
1y5m site age
Aviation

Aviation

Q&A for aircraft pilots, mechanics, and enthusiasts

2.8k questions
6.1k answers
99% answered
6k users
8.3k visits/day
5.2 questions/day
1y5m site age
Ebooks

Ebooks

Q&A for ebook publishers and readers

550 questions
934 answers
87% answered
2.6k users
1k visits/day
0.8 questions/day
1y5m site age
Beer

Beer

Q&A for beer aficionados and collectors

364 questions
844 answers
97% answered
2k users
1.3k visits/day
0.5 questions/day
1y4m site age
Software Recommendations

Software Recommendations

Q&A for people seeking specific software recommendations

5k questions
5.5k answers
58% answered
9.8k users
4.5k visits/day
12 questions/day
1y3m site age
Arduino

Arduino

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

2.8k questions
3.8k answers
71% answered
6.7k users
5k visits/day
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