Initial program load
With Initial Program Load (abbreviation: IPL ; German: introductory (system) program load ) starting is called an operating system via directly connected storage devices , with program no user program must therefore be understood.
In the past, this term was generally used in the context of IBM mainframes for restarting the operating system. "Performing an IPL" previously meant that the mainframe was restarted. The process it performs is similar to booting a personal computer . With the German mainframe computer TR 440 that meant, in a nutshell: Urstart. This linguistic usage must now be viewed more as historical, because in the meantime the first stage of the execution of a multi-stage boot loader (the so-called "Stage One") is called the Initial Program Load .
In English, the usage of Initial Program Load is ambiguous and not one hundred percent consistent.