Table of Contents
Advertisement
Appendix B
84
Operational Description
Most calculators with which you are familiar allow you to key in numbers only. Most watches
allow you to set just the time and date. The unique HP-01, however, accepts four intrinsically
different kinds of data: decimal numbers, time interval, time of day, and date. This is ac-
complished by three different keys: the decimal point @), the colon @, and the slash @.
Any of the four types of data can be used as operands in arithmetic calculations.
KEYBOARD DATA ENTRY. Decimal Numbers.
The HP-01 assumes the keyboard entry to
be a decimal number unless you press a colon or a slash. Up to seven digits, plus a decimal point,
and a minus sign can be entered.
Although the keyboard entry range is .0000001 to 9999999, the HP-01 display has a much larger
range. If a result is greater than 107 or less than 1074, it is automatically displayed in scientific
notation.
TimeInterval Data. When the HP-01 encounters a colon @, the keyboard entry is interpreted
as time interval data. The range of time entry is 0.01 seconds to 99999 hours, 59 minutes. If
three to five digits are entered before the colon, the display format is HHHHH:MM, where H
Advertisement
Table of Contents
