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Refers to the time a program or device takes to locate a particular piece of data. For disk drives, the terms seek time and access time are often used interchangeably. Technically speaking, however, the access time is often longer than seek time because it includes a brief latency period.
CD versus DVD Note that double layer is only applicable to DVD. 440 nanometers NA Min Pit Length (Double layer) 400 nanometers 830 nanometers Min Pit Length (Single layer) 740 nanometers 1600 nanometers Track Pitch DVD CD Specification
I/O Architecture and Devices I/O Control Method
A collection of wires through which data is transmitted from one part of a computer to another
All buses consist of two parts -- an address bus and a data bus. The data bus transfers actual data whereas the address bus transfers information about where the data should go
The size of a bus, known as its width, determines how much data can be transmitted at one time. For example, a 16-bit bus can transmit 16 bits of data, whereas a 32-bit bus can transmit 32 bits of data.