The Anatomy Of MP3 Players
MPEG-1 Audio Layer 3 or MP3 for short has become a common audio format that is deployed to transfer and playback music on digital audio player. It was designed by the Moving Picture Experts Group which included amongst others, Fraunhofer of Germany, Thomson-Brandt, AT&T-Bell Labs of USA, and CCETT. It obtained an ISO/IEC standard in 1991.
Navigational Tools Now Enabled With GPS
Many Portable Digital Assistants (PDAs) now have been enabled with the Global Positioning System (GPS). This is a global navigation satellite system (GNSS) established and managed by the United States Department of Defense of the United States Air Force 50th Space Wing. GPS can be used freely by any civilians anywhere. Enabling PDAs with GPS receivers will allow it to determine its current location by transmitting precise radio signals to a constellation of 24 to 32 medium earth orbit satellites. GNSS became fully operational in 1995. Its application for navigational purposes has spread globally whether land, air or sea. It is a useful tool for tracking, surveillance, map-making, land surveying, scientific use and commerce. In the late 1990s, the first GPS enabled handsets were launched.
From The Digital Diary To Smartphones
Casio launched the first hand held computer in 1983 with its Casio PF-3000. The product was a plain digital diary. Psion of United Kingdom developed the first pocket computer in 1984. Called the Psion Organiser I, it consisted of a flat-file data base, calculator and clock. There was no operating system. These products opened up a new range of hand held computers that came to be called Personal Digital Assistants, palm pilots and palmtops. These products sent waves of excitement amongst consumers. The first to join by launching their own handheld computers were such companies as Apple and Palm Computing. Palm Pilot that became a popular PDA was launched at the end of 1990s. The first mobile phone to be launched with the PDA functionality was in 1996 by Nokia. This PDA, called 9000 Communicator, topped the sales chart globally. Soon smartphones, a new class of phones, made its way into the market with products such as Nokia N-Series, the RIM Blackberry and Apple iPhone.
The Multi Headed Device: The PDA
A Personal Digital Assistant (PDA) is a handheld computer. It is also known as a palmtop computer as it has the key functions of a computer. It is the size of the palm which makes it extremely convenient to carry around. It acts as a media player, web browser and mobile phone. Wi-Fi or Wireless Wide-Area Networks enable many PDAs to access the Internet, intranet or extranets.
Why Must You Own A PDA Gadget?
A personal digital assistant (PDA), also called a palmtop computer, is a handheld computer. Color screens as well as audio capabilities have been introduced into the newer PDAs so that they can also be used as smartphones or mobile phones, portable media players or web browsers. Many PDAs can now access the Internet, intranets or extranets using Wi-Fi, or Wireless Wide-Area Networks. Touch screen technologies too have been introduced.