Personal Digital Assistant
Personal Digital Assistant (English: Personal Digital Assistant, abbreviation: PDA), generally refers to the palmtop computer. Relative to the traditional computer, personal digital assistant has the advantage of light, compact, and mobile, while losing the function of the powerful, the disadvantage is the screen is too small, and battery life is limited. Personal digital assistants usually use stylus as input device, and memory card as external storage media. In terms of wireless transmission, most personal digital assistants have infrared and Bluetooth interfaces to ensure the convenience of wireless transmission. Many personal digital assistants also have Wi-Fi connectivity and global positioning systems. Portability Personal computers between personal computers and PDAs are laptops, UMPC and tablet PCs. The first personal digital assistant was born in 1992 by Apple Computer Newton. But this product is very unsuccessful in business. Later appeared specifically for the handwriting input Graffiti input method, a use of this method as an input method of personal digital assistant company launched a series of Palm products, and was a great success. At the end of the 20th century, Microsoft entered this area and first introduced Windows CE 1.