Several terminals used for data entry to a computer share a communication line. Terminals use the line on a first-come, first-served basis and wait in a queue when the line is busy. Describe the...

Several terminals used for data entry to a computer share a communication line. Terminals use the line on a first-come, first-served basis and wait in a queue when the line is busy. Describe the elements of this queueing system and identify the assumptions that need to be made to analyze system characteristics. (Allen (1990)).