DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1255
| Date of introduction: | 1976 | Display technology: | LED-stick |
| New price: | Display size: | 8 | |
| Size: | 5.5" x 2.8" x 1.4" | ||
| Weight: | 5.5 ounces | Serial No: | 1242627 |
| Batteries: | 2 * AA NiCd | Date of manufacture: | wk 16 year 1976 |
| AC-Adapter: | AC9130 | Origin of manufacture: | USA |
| Precision: | Integrated circuits: | ||
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Cleo McCall |
Texas
Instruments took in 1976 in conjunction with mathematics educators at two major
universities an initiative to introduce a group of 6 calculators for educational
use. Including the Little Professor,
the limited function ABLE calculator, the colorful TI-1205
and TI-1255, the TI-30 and the
sophisticated SR-51-II, these
calculators helped students understand and use math concepts from kindergarten
through college and career.
The TI-1255 is based on the TI-1250 but includes rechargeable NiCd-batteries instead the standsrd 9V block battery. To enhance the readability of the keyboard both the size of the numerals and the color-scheme was improved.
The TI-1255 is one of the rarest members in the TI-12xx line
and was sold only in the
Don’t miss the LADY 1200, a design developed by marketing guys to attack women’s hand-bags.
| TI-1255.
A rechargeable, full-function capability calculator with automatic
constant and 4-key memory.
Texas Instruments rechargeable TI-1255 is well-suited for students in fundamental mathematics curricula. It includes the same features as the TI-1205, plus independent memory and change-sign key for entering negative numbers. Using the TI-1255’s versatile memory system, students are able to store intermediate results and answers as they explore secondary level math topics. Students may add to [M+] or subtract from [M-] memory a displayed number without affecting the calculation in process. Stored numbers may be displayed by using memory recall [MR], and the memory can be cleared [MC] without clearing the calculator. Convenient algebraic entry allows students to enter problems in the same order they would write them on paper. A touch of the change-sign key [CS] changes the displayed number from positive to negative or vice versa, and the bright 8-digit display and large keyboard numerals offer good visibility. A
supplement learning package “Calculator Math™ Fundamental
Mathematics”, was developed and tested by the © Texas Instruments, 1976 |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.