- I love ED on CP/M. It’s often derided but I think it’s just misunderstood and with a little practise its true value can shine through. It’s elegant, easy to learn and only has about 25 commands but these can be combined. Once you get used to it most editing tasks are pretty quick. If I’m editing text that is made up of separate lines, ideally not more than the width of the terminal, I find it excellent. It does have a line limit of 128 characters so for continuous prose I will switch to something like Wordstar, but for editing source code and config files on CP/M, it’s my first choice.