Larry Wall
“Guru of Perl“.He is well known as creator of “Perl”  Language.

He is the writer of  the “Patch” Program.

He is the co-author of the bestselling book named Programming Perl, also referred as “the Camel book.”
Bill Joy
William Nelson Joy.He is mostly known as “Bill Joy”.

He is the co-founder of Sun Micro systems.

He is the founder of BSD – Unix.

He is the author of the vi text editor.
Ted Codd
Edgar Frank Ted Codd.He is the Father of the Relational Database.

He found 12 rules named E.F. Codd Rules to define how a relational database is constituted.

One of the normal form is named after him i.e. the Boyce Codd normal form.

The Term OLAP : Online Analytical Processing was coined by him with that 12 laws for that.
Anders Hejlsberg
Anders HejlsbergHe was the original author of Turbo Pascal.

He is the founder of J++ Programming Language and Windows Foundation Classes.

Since 200, He is the lead architect of the team of C#.
Richard Stallman
RMS  i.e. Richard Matthew Stallman .He is the founder of GNU Project for creating a free Unix-like operating system.

He is Founder and president of free Software Foundation working for free Software Movement.

He is the pioneer of the concept of CopyLeft.

He is the main behind GNU General Public License i.e. used for free software license.
John Backus
John Warner Backus.He is the Founder of first Programming Language : FORTRAN.

He also founded one of the normal form BNF : Backus-Naur form.
Grace Hopper
Grace Murray Hopper.She is known as a Cobol Pioneer.

She developed the first compiler for a computer programming language.

Sometimes she also referred to as “Amazing Grace“.
Yukihiro Matz
Yukihiro ‘Matz’ Matsumoto’.He is the Creator of Ruby Programming Language.

He is best known as the chief designer of the Ruby programming language.

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