Happy Mainframe Day!
OTD 1964: IBM announces the System/360 family. 8-bit bytes ftw!

Shown: Operator at console of Princeton's IBM/360 Model 91.

@aka_pugs Only 8 bits per word? That will never be enough for anyone! 18 bit words like the PDP-1 or 12 bit words like the PDP-8, now that's serious computing! Also, 8 bit words make octal representation, the one true number representation in computers, quite pointless…