Shilling
The abbreviation for shilling is s, from the Latin solidus, the name of a Roman coin. Often it was informally represented by a slash, standing for a long s: e.g., "1/6" would be 1 shilling and sixpence, often pronounced "one and six" (and equivalent to 18d; the shilling itself was valued at 12d). A price with no pence would be written with a slash and a dash, e.g., "11/-". Quite often a triangle or (serif) apostrophe would be used to give a neater appearance, e.g., "1'6"  and "11'-". In Africa it is often abbreviated sh.