The pre-decimal initials "Lsd" stood for 'librae', 'solidi' and which other?

Lsd, also written '£sd', was the popular name for the pre-decimal currencies used in Britain, the Commonwealth and Europe. It refers to pounds, shillings and pence, but stands for the Latin monetary dominations 'librae', 'solidi' and 'denarii'. 'Librae' were the Roman equivalent of pound coins, and 'solidi' and 'denarii' were gold and silver coins respectively.

King Offa of Mercia (died 796 AD) adopted the 'librae', 'solidi' and 'denarii' (Lsd) into Britain in the late 8th century. The system was used throughout Britain and the Commonwealth until the 1960s and 1970s. The Lsd system was also used across much of the European continent, until the 18th and 19th centuries when they adopted decimalisation. Britain did not embrace decimalisation until 1971.

Under the British Lsd system, there were 12 pence (12d) in a shilling (1s) and 20 shillings (20s), or 240 pence (240d), in a pound (£1). The penny (singular of pence) was subdivided into 4 farthings, but on 31st December 1960 they ceased to be legal tender. The penny could also be split into two halfpennies or 'ha'pennies' until 31st July 1969.

Many coins in the Lsd system developed nicknames, for instance, a farthing or halfpenny was called a 'mag' (slang for 'chattering') because they were made from copper and made a ringing noise when dropped. A shilling was often referred to a 'bob', and a pound a 'nicker' or 'quid'.