(2) A receptacle into which a plug can be inserted.

(3)A receptacle for a microprocessor or other hardware component. See also CPU socket.

PC system processor reference guide 
Comprehensive look at the system processor. Covers semiconductor technology, manufacturing, characteristics, power, voltage levels, cooling, packaging, sockets, external and internal architecture. Discusses performance factors. Complete look at over 20 popular processors, including the latest offerings from Intel, AMD and Cyrix.

Processor Sockets and Slots 
Describes socket and slot standards and other issues related to mating processors to the system motherboard. This page is from "The PC Guide."

An Introduction to Socket Programming
Course notes directed at UNIX application programmers who want to develop client/server applications in the TCP/IP domain.

Processor Physical Characteristics
Discusses the physical properties of processors. Includes information on processor manufacturing, physical chip characteristics, power and voltage, cooling and packaging, and sockets and slots.

Programming UNIX Sockets in C - FAQ
Answers questions about programming TCP/IP applications in UNIX with the sockets interface.