arXiv (pronounced "archive") is a repository of electronic preprints, known as e-prints, of scientific papers in the fields of mathematics, physics, astronomy, computer science, quantitative biology, statistics, and quantitative finance, which can be accessed online. In many fields of mathematics and physics, almost all scientific papers are self-archived on the arXiv repository. Begun on August 14, 1991, arXiv.org passed the half-million article milestone on October 3, 2008, and hit a million by the end of 2014. By 2014 the submission rate had grown to more than 8,000 per month. 

The arXiv was made possible by the low-bandwidth TeX file format, which allowed scientific papers to be easily transmitted over the Internet and rendered client-side. Around 1990, Joanne Cohn began emailing physics preprints to colleagues as TeX files, but the number of papers being sent soon filled mailboxes to capacity. Paul Ginsparg recognized the need for central storage, and in August 1991 he created a central repository mailbox stored at the Los Alamos National Laboratory which could be accessed from any computer. Additional modes of access were soon added: FTP in 1991, Gopher in 1992, and the World Wide Web in 1993. The term e-print was quickly adopted to describe the articles.
What's the main topic?
When did it begin?
In what month?
And day?
What was the rate of submission by 2014?
When did they clear half-million articles?
Who emailed TeX files around 1990?
What did those email cause?
What did Paul Ginsparg see?
And what did he do about it?
Where would they be stored?
What could access that?
Are there other access ways?
How many?
Which one came out first?
In what year?
How many years til the next come out?
What was its name?
When was the WWW added?
arXiv
arXiv 
1991
1991
August
August 
14th
14
8,000 per month
8,000 per month
October 3, 2008
October 3, 2008
Joanne Cohn
Joanne Cohn
they filled mailboxes to capacity
filled mailboxes to capacity
He recognized the need for central storage.
recognized the need for central storage
He created a central repository mailbox.
he created a central repository mailbox
Los Alamos National Laboratory
Los Alamos National Laboratory
Any computer.
any computer
Yes.
 FTP in 1991, Gopher in 1992, and the World Wide Web in 1993
Three
 FTP in 1991, Gopher in 1992, and the World Wide Web in 1993.
FTP
FTP
1991
1991
One
FTP in 1991, Gopher in 1992
Gopher
Gopher
1993
1993