CP/M abstracted IO operations and allowed you to write applications that where machine agnostic. This was a big deal at the time since there were a large number

CP/M abstracted IO operations and allowed you to write applications that where machine agnostic. This was a big deal at the time since there were a large number of BASICs that were incompatible for doing low-level operations. As an example Reddit's /r/retrobattlestations had their annual BASIC week[0] where they take a BASIC program and port it to a bunch of different machines. As you can see they have 11 different versions. [0] https://www.reddit.com/r/retrobattlestations/comments/2fn1zq/basic_week_3_under_the_sea/ https://www.reddit.com/r/retrobattlestations/comments/2fn1zq...