ABSTRACT
Examples of these might be the multiple berths for loading or unloading facilities in a port for ships, two shovels in the same area of a mine, and six tellers in a bank. GPSS/H handles these by means of a combination of a Block and a statement. The Block is used in the program for the transaction to actually use one of the parallel servers. The statement tells the processor how many of these servers are available. These servers will be referred
to as storages. The Block for the transaction in the programs is the ENTER Block. One form of the ENTER Block is
ENTER A
where A is the operand. This can be a name or a number. If it is a number, it cannot exceed the maximum number of such ENTER Blocks allowed in your system. It is also possible to have this operand to be a variable, as we shall see later.
