URL
 Uniform Resource Locator. It is a term used in the web world or other internet sources, which has two different meanings to it. One, it is popularly known as the Uniform Resource Identifier (URI).Technically people refer to it as URL instead of URI. Second, it is a subset of URI to identifiers who are primary locators. It is also pronounced as an acronym "EARL".
http://www.blurtit.com/q134699.html
BANDWIDTH

It is the amount of data a communications circuit can accommodate. A slow modem delivers low bandwidth; an ISDN line offers high bandwidth.

The bandwidth is a data transmission rate.
http://www.blurtit.com/search/?askquery=lateral+meaning+of+bandwidth
CRL
Certificate Revocation List", is a list of digital certificates which have been revoked, are no longer valid, and should not be relied upon by any system user. A certificate is revoked if it is discovered that the certificate authority (CA) had improperly issued a certificate to the wrong person and/or with the wrong public key, to a person or institution who is not eligible, etc. All the certificates on a CRL are invalid from the time of their publication.
http://www.birds-eye.net/definition/c/crl-certificate_revocation_list.shtml

 LCD

 (liquid crystal display) is the technology used for displays in notebook and other smaller computers. Like light-emitting diode (LED) and gas-plasma technologies, LCDs allow displays to be much thinner than cathode ray tube (CRT) technology. LCDs consume much less power than LED and gas-display displays because they work on the principle of blocking light rather than emitting it.
http://www.answers.com/topic/crt#ixzz1CZz6Xotq
 IP-ADDRESS
An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication.[1] An IP address serves two principal functions: host or network interface identification and location addressing.
(http://en.wikipedia.org/wiki/IP_address)
 USB
Universal Serial Bus can connect computer peripherals such as mice, keyboards, digital cameras, printers, personal media players, flash drives, Network Adapters, and external hard drives. For many of those devices, USB has become the standard connection method.
(http://en.wikipedia.org/wiki/Universal_Serial_Bus)
 CD ROM
CD Rom-A CD-ROM (pronounced /ˌsiːˌdiːˈrɒm/, an acronym of "Compact Disc Read-only memory") is a pre-pressed compact disc that contains data accessible to, but not writable by, a computer for data storage and music playback. The 1985 “Yellow Book” standard developed by Sony and Philips adapted the format to hold any form of binary data.
(http://en.wikipedia.org/wiki/CD-ROM)
  ICT
Information and communications technology or information and communication technology,[1] usually called ICT, is often used as an extended synonym for information technology (IT) but is usually a more general term that stresses the role of unified communications and the integration of telecommunications (telephone lines and wireless signals), intelligent building management systems and audio-visual systems in modern information technology.
(http://en.wikipedia.org/wiki/Information_and_communications_technology)
 LED
-A light-emitting diode (LED) (pronounced /ˌɛl iː ˈdiː/, L-E-D[1]) is a semiconductor light source. LEDs are used as indicator lamps in many devices, and are increasingly used for lighting. Introduced as a practical electronic component in 1962,[2] early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared wavelengths, with very high brightness.
(http://en.wikipedia.org/wiki/LED)
 CPU
“Central Processing Unit”, is the brains of the computer. Sometimes referred to simply as the processor or central processor, the CPU is where most calculations take place. In terms of computing power, the CPU is the most important element of a computer system. On large machines, CPUs require one or more printed circuit boards. On personal computers and small workstations, the CPU is housed in a single chip called a microprocessor.
(http://www.birds-eye.net/definition/c/cpu-central_processing_unit.shtml)