J
jabber
jack
jagged margin
jaggies
jaggy
jam
Janet
Java
Java applet
Java chip
Java terminal
JavaScript
JCL
JMAPI
job
job buffer
job class
job control block
Job Control Language
job control statement
job flow control
job library
job mix
job monitoring
job number
job processing
job processing control
job scheduling
job stacking
job step
job stream
job-oriented terminal
join
joint
Joliet
JOSS
journal
JOVIAL
joystick
jpeg
Julian calendar
Julian date
jump
jump table
jump trace routine
junction point
junction transistor
junk mail