JBOD : Acronym for Just a Bunch of Drives. This is typically similar in appearance to a RAID system. There is no redundant capability. You just keep filling the drives as one large storage capacity. JBOD can store as much as twice the capacity of RAID systems because of the redundant nature of RAID.
Jog Shuttle : This is a front panel knob sometimes installed on DVRs and VCRs. Moving the jog shuttle’s inner and outer rings provide control for playback and menu navigation. The jog shuttle is usually in addition to traditional VCR style button controls.
JPEG : (Joint Photographic Experts Group): This is a video compression method for single images. It was originally developed to reduce video image file sizes for transfer through the Internet. See M-JPEG, MPEG-4 and H.264.