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These numbers look typically like 314, 2676 ATA or I1090.If you study this article carefully youll learn that the first calculator is a Datamath Version 2 manufactured April, 1973, the second calculator was produced in the Abilene, TX facility and the third is a modern, Taiwanese LCD calculator. Starting with the introduction of both the Datamath and the early Desktop calculators Texas Instruments used visible ink to stamp the manufacturing date on the back of the calculator housing using a 3-digit code.
Update Star has been tested to meet all of the technical requirements to be compatible with Windows 10, 8.1, Windows 8, Windows 7, Windows Vista, Windows Server 2003, 2008, and Windows XP, 32 bit and 64 bit editions.Calculators introduced in the year 1976 or later use another coding with 4-digits embossed into the mold of the rear case shell.This method was durable, in some cases the readability is limited due to bad adjusted temperature or pressure of the tooling.Other calculators stayed longer, the famous TI-68 was introduced 1991 and was available in some countries till the year 2000.If you inspect the calculators manufactured by Texas Instruments carefully you will notice small numbers stamped with ink on the body shell, embossed in the plastic mold or printed on the license plate.Some calculators like the SR-50 got the date code printed on hidden places like the internal plastic frame below the battery pack.
If you can read only parts of the numbers you should open the calculator and search the manufacturing date on the integrated circuits to limit the possible date range.
Later far East products use a novel 4-digit coding for the date of manufacturing.
You should be able to decipher 5 different coding schemes of the manufacturing date to cover all calculators and related products manufactured by Texas Instruments.
The linear regression helps us identify variance from the trend. Today's release of the publicly available data from ECRI puts its Weekly Leading Index (WLI) at 147.6, up 0.6 from the previous week and at another record high.
Year-over-year the four-week moving average of the indicator is now at 2.19%, down from 2.46% last week.
With the TI-1750, the first Texas Instruments calculator produced in Japan another coding scheme using 3-digits was introduced.