Synchronous Digital Hierarchy

Abbreviation for synchronous data link control. A proprietary, code-independent, link-control protocol.

Standards Development Organization

1. Service Delivery Platform,
2. Session Description Organization.

Software Defined Radio

Standard Definition Television

Service Enablers

1. A checksum, which may be cryptographic, computed over some data to provide integrity for that data [ECMA138].
2. A cryptographic checkvalue that supports integrity but does not protect against forgery by the recipient (i.e., it does not support non-repudiation). When a seal is associated with a data element, that data element is 'sealed' [10181-1].

A specialized program that facilitates information retrieval from large segments of the Internet.
Note 1: Search engines attempt to help a user locate desired information or resources by seeking matches to user-specified key words. The usual method for finding and isolating this information is to compile and maintain an index of Web resources that can be queried for the key… (Read More →)

See bot, droid.