At the beginning of the 1970s the cost of calculators dropped to
a few dollars as components and their production techniques
improved, and the effect of economies of scale were felt so that
. Many companies were forced to close and the few
that survived were those with high
outputs of higher quality calculators, or producing
high-specification scientific and programmable calculators.
..The 3 leading manufacturers,Casio, HP and TI, released increasingly
feature-laden calculators dand at the
turn
of the millennium, the line between a graphing calculator
and a handheld computer was not always clear, as some very
advanced could differentiate and integrate functions, solve
differential equations, run word processing and PIM software,
and connect by wire or IR to other calculators/computers.
Calculator resources including engineering, statistical,
and Basic , Financial & Business,Graphing ,
Printing and Scientific
calculators.
4137com , ASuperShop Electronics, Aurora , AURORA, Aurora
Corporation , Avery, Big Display , BNF ,
Calculated Industries , Canon ,CANON ,Casio , Compucessory,
Datexx , Excalibur, Expocell , Gift Warehouse, GiftGadge,
Hewlett-Packard , INNOVERA , JOT , Kensington ,
Kikkerland , Maxi-Aids , Monroe ,Nukote , Office Depot ,
Olivetti , Palm , Princess , Rolling Oak Publishing , Royal ,
Samsonite ,Seagate , Sentry ,Sharp , Sharp Electronics
Corp. , Sharp HO , SmartDisk , Sparco, TDK , Teac , Texas
Instrument , Texas Instruments , Thermaltake ,
Universal , UNIVERSAL , Victor , Victor Technologies , Zelco .
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