<Li> After the introduction of the first pocket calculators supporting scientific notation in 1972 (HP - 35, SR - 10) the term decapower was sometimes used in the emerging user communities for the power - of - ten multiplier in order to better distinguish it from "normal" exponents . Likewise, the letter "D" was used in typewritten numbers . This notation was proposed by Jim Davidson and published in the January 1976 issue of Richard J. Nelson's Hewlett - Packard newsletter 65 Notes for HP - 65 users, and it was adopted and carried over into the Texas Instruments community by Richard C. Vanderburgh, the editor of the 52 - Notes newsletter for SR - 52 users in November 1976 . </Li> <Li> FORTRAN (at least since FORTRAN IV as of 1961) also uses "D" to signify double precision numbers . </Li> <Li> Similar, a "D" was used by Sharp pocket computers PC - 1280, PC - 1470U, PC - 1475, PC - 1480U, PC - 1490U, PC - 1490UII, PC - E500, PC - E500S, PC - E550, PC - E650 and PC - U6000 to indicate 20 - digit double - precision numbers in BASIC between 1987 and 1995 . </Li> <Li> The ALGOL 60 (1960) programming language uses a subscript ten "" character instead of the letter E, for example: 6.022 23 . </Li>

Which means 6 less than 5 times a number is 4 more than 3 times that number