Memory module

Memory module is a broad term, and could refer to these specific types of memory module:

• Dual in-line package memory
• TransFlash Memory Module
• SIPP memory, Single In-line Pin Package memory
• SIMM, a Single Inline Memory Module
• DIMM, Dual Inline Memory Module

§  Rambus memory modules are a subset of DIMMs, but are usually referred to as RIMMs

§  SO-DIMM, Small outline DIMM, a smaller version of the DIMM, used in laptops

 

real-time clock (RTC)

A real-time clock (RTC) is acomputer clock (most often in the form of an integrated circuit) that keeps track of the current time. Although the term often refers to the devices inpersonal computers, servers and embedded systems, RTCs are present in almost any electronic device which needs 

Public switched telephone network

The public switched telephone network (PSTN) is the network of the world's public circuit-switchedtelephone networks, in much the same way that the Internet is the network of the world's public IP-basedpacket-switched networks. Originally a network of fixed-line analog telephone systems, the PSTN is now almost entirely digital, and now includes mobile as well as fixed telephones.

The PSTN is largely governed by technical standards created by the ITU-T, and uses E.163/E.164addresses (more commonly known as telephone numbers) for addressing.