Short for Small-Outline J-lead, a type of chip module that uses J-shaped pins that extend inwards. Unlike DIPs, which plug into holes on the circuit board, an SOJ chip attaches directly to the circuit board’s surface.
Short for System Object Model, an architecture developed by IBM that allows binary code to be shared by different applications. It serves the same purpose as Microsoft’s competing COM standard. SOM is a full implementation of CORBA. A distributed version of SOM that allows binary objects to be shared across networks is known as DSOM.
- Synchronous Optical Network (SONET)
Short for Synchronous Optical Network, a standard for connecting fiber-optic transmission systems. SONET was proposed by Bellcore in the middle 1980s and is now an ANSI standard. SONET defines interface standards at the physical layer of the OSI seven-layer model. The standard defines a hierarchy of interface rates that allow data streams at different rates […]
Short for Small Outline Package, it’s a low-profile rectangular surface-mount component package. Its chip is bonded to an inner land contact area (usually a lead frame). External terminals exit parallel to the seating plane on two opposite sides of the moulded, flat package. SOPs use gull wing formed leads, and is a surface mount package […]
Acronym for Spam and Open Relay Blocking System. SORBS was originally an anti-spam project where a daemon would check, in real time, all servers from which it received e-mail to determine if that e-mail was sent via various types of proxy and open-relay servers. SORBS has evolved into SORBS DNSbl (DNS-based blacklist) which now includes […]
- SO DIMM
Short for Small Outline DIMM, a small version of a DIMM used commonly in notebook computers. Whereas a full-size DIMM has 168 pins and supports 64-bit transfers, a SO DIMM has only 72 pins, which supports only 32-bit transfers, or 144 pins, which supports a full 64-bit transfer.