Handheld personal computers

Since the mid 1990s, many new types of small personal computing devices have been introduced . and all fall under the category of  handheld personal computers. these tiny systems are also called palmtop computers, a handheld  Pc can be any sort of computer that fits in the user's hand, such as

1. Personal digital assistant
2. Cellular telephone with internet , email and fax capabilities.
3. H/PC Pro device

some of the handheld personal computers look like  mininotepad computers with small displays and keyboards, but are much smaller than even the tiniest full-featured notebook PC.This type of H/PC is sometimes called a mini - notebook computer. Most H/PC systems do not provide disks, but memory can be added  through PC cards or other means. software is abundant for these devices , most of which are internet - capable and can connect yo a full- size computer to exchange data.

Personal digital Assistants:

Personal digital assistants are among the smallest of portable computers, often they are no larger than a small appointment book, but they are much less powerful than notebook or desktop computers. PDAs are normally used for special applications, such as taking notes, displaying telephone numbers and addresses, and keeping track of dates or agendas. Many PDAs can be connected to larger computers to exchange data.

Most PDAs come with an electronic pen that lets the user write on a touch sensitive screen.
Even  though they do not include real keyboards, some of these devices provide a graphical keyboard  that appears on the screen . you type by tapping the desired keys with the units pen. Depending on the model, PDAs may include the following features:

1. Built in micro phone and speaker , enabling the user to record speech digitally.
2. Personal information management (PIM) software.
3. Miniaturized versions of personal productivity applications.
4. Internet , fax, or email software.

Cellular phones

Some new cellular phones are doubling as miniature PCs. advanced cellular devices combine analog and digital cell phone service with email capabilities. Such phones enable the user to check and send email and faxes over the phone. they offer features not normally found on a phone, such as personal organizers or access to the web. Some models even break in half to reveal a miniature keyboard.

H/PC Devices:

Probably the most curious new development in handheld technology is the  H?PC Pro family of devices. these systems are larger than PDAs or  miniature notebooks, but they are not quite as large as typical notebook PCs, with features some where between the two. for  example , H/PC Pro systems boast nearly full sized keyboards and color displays . they can run more types of miniaturized applications than their smaller counterparts, but those applications still do not provide the features of normal desktop software. H/PC Pro units offer long battery life and instant - on access but they  do not include disks. although they will gain speed and storage capacity quickly, H/ PC Pro systems offer very limited RAM and relatively slow processor speeds.

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