Technology / Television (TV) / Audio-Video Jacks: Standard definition Satellite TV system receivers would normally include three jacks: one for the video - composite or S-Video, and two for the sound - one for the right channel and one for the left. The audio jacks are necessary for stereo sound. R/F connectors (coaxial cable) will not provide stereo from the satellite receiver.
Business / Construction / Plumbing Jacks: Sleeves that fit around drain and waste vent pipes at, and are nailed to, the roof sheeting. MORE
Technology / Motors / Jackscrew: A device used for leveling the positioning of a motor. These devices are adjustable screws fitting on the base or motor frame. Also a device for removing endshields from a motor assembly. MORE