Editing RT-11 (section)

===Multitasking===
RT-11 systems did not support [[Computer multitasking|preemptive multitasking]], but most versions could run multiple simultaneous applications. All variants of the monitors provided a ''background job''. The FB, XM, and ZM monitors also provided a ''foreground job'', and six ''system jobs'' if selected via the SYSGEN [[system generation]] program. These tasks had fixed [[Scheduling (computing)|priorities]], with the background job lowest and the foreground job highest. It was possible to switch between jobs from the [[system console]] user interface, and SYSGEN could generate a monitor that provided a single background job (the SB, XB and ZB variants).<ref name="RT11.HC82Decem" />  The terms ''foreground'' and ''background'' are counterintuitive; the background job was typically the user's [[Command-line interface|command-line interpreter]]; a foreground job might be doing something like non-interactive data collection.