Vi editor is a lightweight text editor on Linux and derived from the name “visual”. The original vi program was written by Bill Joy in 1976 for an early BSD Unix release. Some current implementations of vi can trace their source code ancestry to Bill Joy; others are completely new, largely compatible reimplementations.
Vim is a highly configurable text editor built to enable efficient text editing. It is an improved version of the vi editor distributed with most UNIX systems. Vim is often called a “programmer’s editor,” and so useful for programming that many consider it an entire IDE. It’s not just for programmers, though. Vim is perfect for all kinds of text editing, from composing email to editing configuration files. Despite what the above comic suggests, Vim can be configured to work in a very simple (Notepad-like) way, called evim or Easy Vim.
VIM Official
Vim or Vi IMproved released by Bram Moolenaar in 1992 for the Amiga computer, is an extended version of the Vi editor. The improvement comes with many additional features designed to be helpful in editing program source code. Vim can also be extended by adding add-ons.