Tablet PCs

Tablet PCs are notebook computers with a liquid crystal display (LCD) on which the user writes with a special pen called a stylus. These pens of styli can be wireless devices or attached to the tablet PC via cords or wires. There are two basic types of tablet PCs: traditional and convertible. Traditional products are more rectangular and permit the use of X-Y coordinate logging and optical character recognition (OCR). Convertible products are thin-framed notebook computers that include a foldout keyboard.

Performance specifications for tablet PCs include maximum resolution in lines per inch and maximum sampling rate, the rate at which tablet PCs process user inputs. Accuracy, another important product specification, separates various product lines. Notebook computers that perform standard diagnostic tests can alert users about potential performance problems. Serial interfaces for tablet PCs include universal serial bus (USB), RS232, and RS422. Parallel interfaces include general-purpose interface bus (GPIB), an 8-bit standard. Tablet PCs that use special forms of transistor-transistor logic (TTL) or discrete signals are also available.

Most tablet PCs include special tablet PC software, or standard applications that are compatible with popular operating systems (OS). A basic tablet PC may include a simple word processing application. A more device may include productivity software that provides the user with the ability to schedule tasks or create spreadsheets. Reading a tablet PC comparison or performing an on-line tablet PC review is a good way to learn about product features. 

There are many applications for tablet PCs. An industrial tablet PC can be used by plant workers, machine operators, or inspectors in manufacturing environments. A rugged tablet PC can be used by personnel who work outdoors (e.g., forestry, utilities, and construction), or by emergency personnel such as police officers, firefighters and paramedics. In the commercial sector, tablet PCs have become increasingly popular due to increased processor abilities and the development of languages such as Java and Python. A used tablet PC or a refurbished tablet PC is suitable for many applications.

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