The letter J

J. Random /J rand'm/ n. [generalized from J. Random Hacker]
J. Random Hacker [MIT] /J rand'm hak'r/ n. A mythical figure
jack in v. To log on to a machine or connect to a network or
jaggies /jag'eez/ n. The `stairstep' effect observable when an
JCL /J-C-L/ n. 1. IBM's supremely rude Job Control
JEDR // n. Synonymous with IYFEG. At one time, people in
JFCL /jif'kl/, /jaf'kl/, /j*-fi'kl/ vt., obs. (alt.
jiffy n. 1. The duration of one tick of the system clock on the
job security n. When some piece of code is written in a
jock n. 1. A programmer who is characterized by large and somewhat
joe code /joh' kohd`/ n. 1. Code that is overly tense and
jolix n. /joh'liks/ n.,adj. 386BSD, the freeware port of the
JR[LN] /J-R-L/, /J-R-N/ n. The names JRL and JRN were
JRST /jerst/ [based on the PDP-10 jump instruction] v.,obs. To
juggling eggs vi. Keeping a lot of state in your head while
jump off into never-never land [from J. M. Barrie's "Peter
jupiter [IRC] vt. To kill an IRC robot or user and