Scheduler for asynchronous script processing

As a IT programmer, we have to handle scripts on many platforms, e.g. DOS, ksh.
Due to limited functionality of script language, it is not easy to schedule many scripts to let them run step by step.

With SAS, we can take it easily.
I strongly recommended SAS programmer should use SYSTASK and WAITFOR to control the script processing.
By contrast, X is suitable for interactive task.

Below are codes from SAS online doc:

systask command "sas myprog1.sas" taskname=sas1;
systask command "sas myprog2.sas" taskname=sas2;
systask command "sas myprog3.sas" taskname=sas3;
waitfor _all_ sas1 sas2 sas3;