Plug compatible: Difference between revisions

(added reflist)
The term PCM was originally applied to manufacturers who made replacements for [[IBM]] peripherals and later IBM mainframes.
 
The first example of a plug compatible IBM subsystems were tape drives and controls offered by [[Telex_Communications|Telex]] beginning 1965.<ref name=Pugh"> {{cite book
| author=Pugh et al
| title=IBM's 360 and Early 370 Systems