.org
Domain suffix usually used to denote non-profit organizations. It is the most commonly used domain suffix on the Internet for non-profit or religious sites.

For webmasters wishing to register the .org domain name, we recommend securing the .com and .net versions of the domain name to prevent cyber squatting.

OC-1, OC-3, OC-12, OC-24, OC-48
Optical Carrier transmission speeds, used in fiber optic networks conforming to SONET standard. OC-1 is 51.85 Mega bits per second. Higher levels are multiples of that speed. OC-3 refers to a circuit that transmits 155Mbps. This is the size of the large Internet backbone providers networks.

ODBC
Open Database Connectivity (ODBC) is a generic way for applications to speak to a database. ODBC acts as an interpreter between an application (say a Cold Fusion or ASP application) and a database (like Microsoft Access).

B y using ODBC, a connector can be created that will allow a web application that you create to read data from and insert data into an Access database that you've created. An ODBC source is a directory entry that specifies database information. This ODBC source (or DSN Source) allows your site to point to the correct database located on the web server.

It is possible to connect to a db without ODBC, but it is a safe bet to assume you need 1 ODBC connection per individual database you will have.

Offline
The state of the computer when it is not connected to the network (i.e. it is not online).

Online
The state of a computer when it is connected to the network and communicate with other machines.

Operating system
A software heart of the computer. It is a set of programs that manage the hardware resources of a computer, provide the environment for application programs to run and provide the user interface. Most known operating systems are: different flavors of Unix (SunOs, HP-UX, Irix, FreeBSD, Linux,...), MacOS and Windows.

OSI
Open System Interconnection). A network standard developed by ISO and CCITT. It describes the way in which protocols of different layers communicate. This enables machines of different vendors to communicate over the network.