TAPI
See telephony application program interface.

TCP/IP
Transmission Control Protocol/Internet Protocol. A networking protocol that allows computers to communicate across interconnected networks and the Internet. Every computer on the Internet supports TCP/IP.

Telephony application program interface (TAPI)
A set of calls that allows applications to control modems and telephones, by routing application function calls to the appropriate “service provider” DLL for a modem.

Telnet
A protocol used for interactive logon to a remote computer.

Thunking
A translation process that converts a 16-bit value to its 32-bit equivalent.

TrueType
A font specification by which fonts are stored as mathematical models that define the outline of each character.

Trust-based security
A cross-platform security model that adds intermediate levels of trust to the Java security model.

Tunnelling
The process of sending packets to a computer on a private network by routing them over some other network, such as the Internet.

TWAIN
An industry-standard software protocol and API that provides easy integration of image data between input devices, such as scanners and still image digital cameras, and software applications.

TWUNKER
A virtual device that allows communications between 32-bit and 16-bit applications.