Portability is the characteristic of a program that can be run on different processors and/or under different operating systems and/or within different display paradigms with little or no implementation differences, sources of user confusion or other bad stuff.
One of the best, highly portable programs is vim, or Vi IMproved: available in MS-DOS, Win16, Win32 (in graphical and text-only modes), OS 7.0 and OS X, BeOS and pretty much any flavour of Un*x.
![[Home]](wikipedia.png)