Statistics I
Introduction
A computer is an electronic device that accepts data as input, processes it, and produces meaningful output as a result.
A computer is an electronic device, operating under the control of instructions stored in its own memory, that can accept data, process the data according to specified rules, produce results, and store the results for future use.
Digital and Analog Computers
Digital Computer
A digital computer operates using binary digits (0s and 1s) to process data through mathematical and logical operations. It's a versatile tool utilized across diverse fields for tasks ranging from basic calculations to complex simulations and data analysis. Example of these computers are IBMPC, Apple/Macintosh etc.
Analog Computer
An analog computer operates on continuous data like length or voltage, using continuous signals. Unlike digital computers, it doesn't rely on exact values but approximations. Widely used in scientific and industrial fields, they excel in solving differential equations and represent physical quantities through waves. Examples include the speedometer, thermometer, barometer, lactometer, and seismograph.
Difference between analog and digital computer
| Analog computer | Digital computer |
|---|---|
| These computers work with physical values such as temperature, pressure, etc. | These Computers work with binary digits (0s, 1s) |
| These computers are based on continuous data. | These computers are based on discrete data. |
| It has very low accuracy. | It has high accuracy. |
| Based on similarity measurement principle. | Based on counting principle. |
| They are faster than digital computers. | Slower than analog computers. |
| It has no or limited storage capacity. | It has high storage capacity. |
| It does a single-purpose job. | It does a multi-purpose job. |
| No possibility of reprogramming. | It can be reprogrammed. |
| The cost is low and portable. | The cost is high and not easily portable. |
| Analog signal processing can be done in real time and consumes less bandwidth. | There is no guarantee that digital signal processing can be done in real time and consumes more bandwidth to carry out the same information. |
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