(1) To copy a program from some source, such as the hard disk or CD-ROM, into memory for execution. In the early days, programs were loaded first and then run. Today, when referring to applications, loading implies load and run. Thus, "load" the program, "run" the program and "launch" the program mean the same thing.
Many people also use the term to refer to installing an application, so "load the program" may mean "install the program."
(2) To fill up a disk with data or programs.
(3) To insert a disk or tape into a drive.
(4) In programming, to store data in a register.
(5) In performance measurement, the current use of a system as a percentage of total capacity.
(6) In electronics, the flow of current through a circuit.
(7) In a network, the volume of traffic.