If anyone's interested, a while back I put together a table of commands available in various versions of ed, from 1st edition UNIX up to POSIX, as well as sam.

If anyone's interested, a while back I put together a table of commands available in various versions of ed, from 1st edition UNIX up to POSIX, as well as sam. It's largely academic, but I did find it interesting how features crept in. http://lubutu.com/misc/ed-languages http://lubutu.com/misc/ed-languages