HASP was rebranded JES2 when 370 came along. IO devices were principally card readers and printers, but the neat trick was the internal reader. Remember that J

HASP was rebranded JES2 when 370 came along. IO devices were principally card readers and printers, but the neat trick was the internal reader. Remember that JES2/3 were running batch jobs. TSO was shiny new.