On March 16, 1953 was born Richard Matthew Stallman. He is an American free software movement activist and programmer. He campaigns for software to be distributed in a manner such that its users receive the freedoms to use, study, distribute, and modify that software. Software that ensures these freedoms is termed free software. Stallman launched the GNU Project, founded the Free Software Foundation, developed the GNU Compiler Collection and GNU Emacs, and wrote the GNU General Public License.
Source: https://en.wikipedia.org/wiki/Richard_Stallman
On March 17, 1924 was born John Warner Backus. He was an American computer scientist. He directed the team that invented and implemented FORTRAN, the first widely used high-level programming language, and was the inventor of the Backus–Naur form (BNF), a widely used notation to define formal language syntax. He later did research into the function-level programming paradigm, presenting his findings in his influential 1977 Turing Award lecture “Can Programming Be Liberated from the von Neumann Style?”
Source: https://en.wikipedia.org/wiki/John_Backus
On March 21, 2006 the origins of Twitter came out of a brainstorming session at the podcasting company Odeo. The initial concept was to share short messages via SMS text messaging with a small group. Jack Dorsey was the primary designer of what was then code-named “twttr” and sent the first message at 9:50am on March 21st, 2006 – “just setting up my twttr.” Twitter would be released to the public that July and found its first major success at the South by Southwest Interactive conference in 2007, shortly after it had been spun-off as its own company, Twitter, Inc.
Source: https://www.computerhistory.org/tdih/march/21/#jack-dorsey-sends-first-tweet