Type of Computers Systems Ii

A tablet PC looks like a book, with an LCD screen on which youcan write using a special digital pen. you can fold and rotate the screen 180 degrees. Your handwriting can be recognized and converted into editable text. You can also type  at the detached keyboard or use voice recognition. It’s mobile and versatile. 

A personal digital assistant or PDA is a tiny computer which can be held in one hand. The term PDA refres to a wide variety of handheld devices, palmtops and pocket PCs.

For input, you type at a small keyboard or use a stylus – special pen used with a touch screen to select items, draw pictures, etc. Some models incorporate handwriting recognition., which enables a PDA to recognize characters written by hand. Some PDAs recognize spoken words by using voice recognition software.

They can be used as mobile phones or as personal organizers for storing notes, reminders and addresses. They also let you access the Internet via wireless technology, without cables.

A wearable computer runs on batteries and is worn on the users body, e.g. on belt, backpack or vest; it is designed for mobile or hand -free operation. Some devices are equipped with a wireless modem, a small keyboard and a scree; others are voice-activated and can access email or voice mail.