Abbreviated as CAS, a signal, or strobe, sent by the processor to a DRAM circuit to activate a column address. DRAM stores data in a series of rows and columns, similar in theory to a spreadsheet, and each cell where a data bit is stored exists in both a row and a column. A processor uses CAS and RAS (row address strobe) signals to retrieve data from DRAM. When data is needed, the processor activates the RAS line to specify the row where the data is needed, and then activates the CAS line to specify the column. Combined, the two signals locate the data stored in DRAM.
- column graph
)A type of presentation graphic in which numerical values are illustrated with horizontal columns. Column graphs are particularly effective for showing values that are categorized by two separate characteristics, such as year and sector.
- combo drive
A combo drive refers to optical drives that are capable of recording and/or reading two or more types of optical media. As DVD drives were introduced, combo drives referred to those optical disk drives that combined CD media read and write capabilities with the capability to read DVD media. As the popularity of DVD media […]
(adj.) A type of data format in which each piece of data is separated by a comma. This is a popular format for transferring data from one application to another, because most database systems are able to import and export comma-delimited data. For example, data pulled from a database and represented in comma-delimited format looks […]
An instruction to a computer or device to perform a specific task. Commands come in different forms. They can be: special words (keywords) that a program understands. function keys choices in a menu buttons or other graphical objects on your screen Every program that interacts with people responds to a specific set of commands. The […]
- command buffer
A temporary storage area where commands are kept. (In DOS environments, the command buffer is called a template.) DOS and UNIX support several operations for manipulating the command buffer. For example, you can use the F3 function key in DOS to copy the template ‘s contents to the display screen. This is useful for repeating […]