1. The impedance of a circuit that, when connected to the output terminals of a uniform transmission line of arbitrary length, causes the line to appear infinitely long.
Note 1: A uniform line terminated in its characteristic impedance will have no standing waves, no reflections from the end, and a constant ratio of voltage to current at a given frequency… (Read More →)

In a recording medium, a unit of linear packing density of characters.

A unit of signaling speed used to express the number of characters passing a designated point per second.

See CCD.

In Universal Personal Telecommunications Service, the geographical location that may be used by the UPT service providers to determine the distance-related charges applying to the call originator and/or to the destination UPT user.

Abbreviation for conversational hypertext access technology. A form of interactive online typewritten communication that allows participants ("members") to engage in text-message conferencing, via real-time computer networking over designated communications facilities ("chat rooms"), without storing the messages.
Note: Participants' messages are instantaneously relayed to all other participants logged into the chat room; in turn, their replies are likewise instantaneously relayed to… (Read More →)

In computer conferencing chat, synonym forum.

An Internet relay chat (IRC) channel designated for the real-time exchange of text messages.
Note: Chat rooms are usually named in such as way as to identify the subject matter of the conversation they are intended to promote. [Bahorsky]

A batch of commands and responses, prerecorded on a terminal computer, for the purpose of facilitating easy or automatic access to a network.
Note: A chat script usually contains a user name and a password that are automatically supplied to the network machine during the login procedure.

Russian terrestrial low frequency navigation system