A tablet computer, or simply tablet, is a mobile computer with display circuitry and battery in a single unit. Tablets are equipped with sensors, including cameras, microphone, accelerometer and touch screen, with finger or stylus gestures replacing computer mouse and keyboard.
The tablet computer and he associated special operating software is an example of pen computing technology. The first patent for a system that recognized handwritten characters by analyzing the handwriting motion was granted in 1915.
In 1987, Apple computer started its tablet project.
In 2000 Microsoft coined the term Microsoft Tablet Pc for tablet Pc`s built to Microsoft specification.
In 2010 Apple introduce the Ipad. The Ipad has …show more content…
Many of these tablets are designed to run android 3.0 honeycomb.
An electronic calculator is a small, portable, often inexpensive electronic device used to perform both basic and complex operations of arithmetic.
The first known tool used to aid arithmetic calculations was the Abacus, devised by Sumerians and Egyptians before 2000 BC.
Computer operating systems as far back as early Unix have included interactive calculator programs such as dc and hoc, and calculator functions are included in almost all PDA-type devices (save a few dedicated address book and dictionary devices).
Modern electronic calculators contain a keyboard with buttons for digits and arithmetical operations. Some even contain 00 and 000 buttons to make large numbers easier to enter. Most basic calculators assign only one digit or operation on each button. However, in more specific calculators, a button can perform multi-function working with key combination or current reckoning