Are all acronyms that starts with "S" we have to use "an" instead of "a"
e.g. You have commenced an SABP (simple account based pension).
Self Covid Isolation Body (SCIB). An SCIB is often complained by members of th public,
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Hi, Tony—If the "S" is pronounced as the letter (namely, as "ess"--e.g., "sending out an S.O.S."), as it is in initialisms, then you have to use "an." If the "s" is not pronounced as the letter but as the sound it stands for (as, in "a SCUBA diver"), as it is in true acronyms, which sound like words, then you have to use "a."