In this task, you are given a sentence or phrase in Xhosa. You must translate it to English in a way that is equivalent in terms of meaning and grammatically correct.

Ithiyori yokufola, iseti yoo-akukhonto oknaye izinto ezikhoyo ezininzi ezilindele ukuncedwa zizibonelelo zeenkonzo. [DIS; IEEE]
Queuing theory, a set of zero or more entities waiting to be serviced by a service facility. [DIS; IEEE]

Uphawu olubonisa ukubizwa olunikelwa uthungelwano.
A call sign provided primarily for voice communication.

ukwazi ukusetyenziswa njengegqudu emva kokudutyulwa ngawo.

pistol could be used as a club once fired.