Shirriff has written several posts about the IBM 1401: his notes on SMS logic cards are particuarly interesting. Sort of like a services architecture, only inst

Shirriff has written several posts about the IBM 1401: his notes on SMS logic cards are particuarly interesting. Sort of like a services architecture, only instead of "real time database" as a component it's "three-way OR". http://www.righto.com/2015/03/a-database-of-sms-cards-technology.html http://www.righto.com/2015/03/a-database-of-sms-cards-techno...