Decimal Day and 10p coin equivalents, co-existed in circulation as valid currency until the early 1990s. In theory this included coins dating back to 1816; in practice the oldest were dated 1947, when these coins stopped containing silver. The coins were withdrawn when smaller 5p and 10p coins were introduced in 1990 and 1992 respectively. The face value of Maundy money coins was maintained, increasing all their face values by a factor of 2.4, as the coins continued to be legal tender as new pence. The numismatic value of each coin, though, greatly exceeds face value. The decimal halfpenny (p), introduced in
Decimal computer the 1620, these machines used word addressing. When non-numeric characters were used in these machines, they were encoded as two decimal digits. Other early computers were character oriented, providing instructions for performing arithmetic on character strings of decimal numerals. On these machines, the basic data element was an alphanumeric character, typically encoded in six bits. UNIVAC I and UNIVAC II used word addressing, with 12-character words. IBM examples include IBM 702, IBM 705, the IBM 1400 series, IBM 7010, and the IBM 7080. The IBM System/360, introduced in 1964 to unify IBM's product lines, used per character binary addressing, and