This ensures that neither device has to wait for too long for data nor gets swamped by too much information at once. A hard disk is a device which usually resides inside a computer for the semi permanent storage of data . It holds data after the computer has been switched off, unlike RAM which looses data when the machine is powered down. Data on the hard disk may be changed by the user.
Storage capacity is measured in megabytes .
Hayes AT command set A set of commands devised by modem manufacturer Hayes that have become the de facto standard for software which controls modems. A modem which is Hayes-compatible can be connected to any computer and controlled by issuing these commands using any terminal communications software. An Internet application needed by a client to provide functionality not contained within the client, such as the ability to play a sound file or act as a Telnet client. The metric measurement of frequency, other uses to measure the speed of a microprocessor or the bandwidth of a communication system. One hertz is equivalent to one cycle per second.