Parallel transmission is primarily used for dot matrix printers and is also used for quick transfer of data from computer to computer. The devise used to visually display the computer output. Maybe acoustic or direct connect. A set of coded instructions that direct the computer to perform a specialized function. The transmission of bits one at a time over a single line.
Serial transmission is used to link computer to computer, computer to printer and computer to modum.
A computer program that produces a matrix of rows and columns having the capability to accept numbers, labels, formulas and perform mathematical operations as instructed. Stores data that is processed. It is erased when the computer is turned off. Generally more RAM makes for a more useable computer. Often contains special instructions to the computer on how to operate.