1. Currency names - current.
Shilling is a generic name for the currencies of Kenya (KES), Somalia (SOS), Tanzania (TZS) and Uganda (UGX).
2. Currency names - pounds - historic.
Historically, before decimalisation, a shilling was 1/20 of a pound.
For example, the former GBP shilling was worth 1/20 of a pound sterling, equivalent to £0.05 following decimalisation.