The fundamental distinction between a calculator and pc is that a pc is programmed in a very method that enables the program to require totally different branches in keeping with intermediate results, whereas calculators area unit per-designed with specific functions (such as addition, multiplication, and logarithms) inbuilt. the excellence isn't clear-cut: some devices classed as programmable calculators have programming functions, generally with support buying an annuity calculator for programming languages (such as RPL or TI-BASIC).
Typically, the user buys the smallest amount pricey model having a selected feature set, however doesn't care abundant regarding speed, since speed is unnatural by how briskly the user will press the buttons. Thus, designers of calculators work to reduce the quantity of logic components on the chip, not the quantity of clock cycles required to try and do a computation.
For instance, rather than a hardware number, a calculator may implement floating purpose arithmetic with code in computer storage (ROM), and calculate pure mathematics functions with the CORDIC rule as a result of CORDIC doesn't need abundant multiplication. Bit serial logic styles area unit additional common in calculators whereas bit parallel styles dominate general computers, as a result of a trifle serial style minimizes chip quality, however takes more clock cycles. This distinction blurs with high-end calculators, that use processor chips related to pc and embedded systems style, additional therefore the Z80, MC68000, and ARM architectures, and a few custom styles specialized for the calculator market.
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