RICHARD STALLMAN

Stallman Achievements:

1. The person who creat the GNU project and give a clarification for peoples     to know their freedom in software world.
 
2. Founded the Free Software Foundation (FSF) in October 1985.

3. Stallman pioneered the concept of copyleft, which uses the principles of copyright law to preserve the right to use and the author of free software license. 

4. Most Notable thing is the GNU General Public License (GPL), the most widely used free software license.

Linus Torvalds

1. Torvalds was born in Helsinki, Finland.

2. The first Linux prototypes were publicly released in late 1991.

3. when another Swedish-speaking computer science student, Lars Wirzenius, took him to the University of Technology to listen to free software guru Richard Stallman's speech.

4. Torvalds used Stallman's GNU General Public License version 2 (GPLv2) for his Linux kernel. 

5. Although Torvalds believes "open source is the only right way to do software", he also has said that he uses the "best tool for the job", even if that includes proprietary software.

6. The Linux Foundation currently sponsors Torvalds so he can work full-time on improving Linux.

Muthu Annamalai

1. He is the person who invent the ezhil programming language and its fully open source language.

2. Using Ezhil you can run a computer using instructions written in Tamil script.

3. Ezhil includes both Tamil and English identifiers.

4. Ezhil is intended to be useful for Tamil-speaking students who donot learn English early, but wish to learn programming for first time. Ezhil is released under GNU GPL license. 

5. The reason he creat the ezhil is if a person want learn the progmming he know about english because the keyword of those languages  are in english.

6. After ezhil the college and school studnet learn programming via tamil language.
                                                            

Siva Ayyadurai

1. He is an Indian-American engineer.

2. He has become known for promoting conspiracy theories, pseudoscience and unfounded medical claims.

3. Ayyadurai claimed he invented email, as a teenager; in August 1982 he registered the copyright on an email application he had written.

4. Ayyadurai sued Gawker Media and Techdirt for defamation for disputing his account of inventing email. Both lawsuits were settled out of court.

5. Ayyadurai and Techdirt agreed to Techdirt's articles remaining online with a link to Ayyadurai's rebuttal on his own website.

6. He is also submited the paper for Genetically modified food.

Dennis Ritchie

1. He is an american computer scientist.

2. Inventor of famous C programming language along with his colleage Ken  Thomson both or working in Bell Labs.

3.  Ritchie began working at the Bell Labs Computing Sciences Research Center, and in 1968.

4. During the 1960s, Ritchie and Ken Thompson worked on the Multics operating system at Bell Labs.

5. Thompson then found an old PDP-7 machine and developed his own application programs and operating system from scratch, aided by Ritchie and others.

6. In 1970, Brian Kernighan suggested the name "Unix", a pun on the name "Multics". To supplement assembly language with a system-level programming language, Thompson created B. Later, B was replaced by C.