Managed Service Provider
*A Managed Service Provider (MSP), also called a Management Service Provider, is a company that manages information technology services for other companies via the Web. An MSP client may use internal operations or an ASP to run its business functions.

Systems Integrator
*An individual or company that specializes in building complete computer systems by putting together components from different vendors. Unlike software developers, systems integrators typically do not produce any original code. Instead they enable a company to use off-the-shelf hardware and software packages to meet the company's computing needs.

Independent Software Vender
*An Independent Software Vendor (ISV) is a business term for companies specializing in making or selling software, usually for niche markets. This includes software such as real estate brokers, time scheduling for healthcare personnel, barcode scanning and stock maintenance. Specialised products generally offer higher productivity to organisations than more generalised software such as basic spreadsheet or database packages. Most large software companies, including Microsoft and IBM, have special programs for ISVs.

Communications / Cellular , Telephony
*The transmission of data from one computer to another, or from one device to another. A communications device, therefore, is any machine that assists data transmission. For example, modems, cables, and ports are all communications devices. Communications software refers to programs that make it possible to transmit data.

*(sel´ū-l&r) (adj.) Refers to communications systems, especially the Advance Mobile Phone Service (AMPS), that divide a geographic region into sections, called cells. The purpose of this division is to make the most use out of a limited number of transmission frequencies. Each connection, or conversation, requires its own dedicated frequency, and the total number of available frequencies is about 1,000. To support more than 1,000 simultaneous conversations, cellular systems allocate a set number of frequencies for each cell. Two cells can use the same frequency for different conversations so long as the cells are not adjacent to each other. For digital communications, several competing cellular systems exist, including GSM and CDMA.

*The science of translating sound into electrical signals, transmitting them, and then converting them back to sound; that is, the science of telephones. The term is used frequently to refer to computer hardware and software that performs functions traditionally performed by telephone equipment. For example, telephony software can combine with your modem to turn your computer into a sophisticated answering service. Voice mail is another popular telephony application.

*Definitions were provided by www.webopedia.com