Analog
An analog or analogue signal is any time continuous signal where some time varying feature of the signal is a representation of some other time varying quantity. It differs from a digital signal in that small fluctuations in the signal are meaningful. Analog is usually thought of in an electrical context, however mechanical, pneumatic, hydraulic, and other systems may also convey analog signals.
An analog signal uses some property of the medium to convey the signal’s information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. Electrically, the property most commonly used is voltage followed closely by frequency, current, and charge.
Any information may be conveyed by an analog signal, often such a signal is a measured response to changes in physical phenomena, such as sound, light, temperature, position, or pressure, and is achieved using a transducer.
For example, in sound recording, fluctuations in air pressure (that is to say, sound) strike the diaphragm of a microphone which causes corresponding fluctuations in a voltage or the current in an electric circuit. The voltage or the current is said to be an “analog” of the sound.

ADOBE SYSTEMS
Adobe Systems Incorporated (pronounced a-DOE-bee IPA: /əˈdoʊbiː/) (NASDAQ: ADBE) is an American computer software company headquartered in San Jose, California, USA.
Adobe was founded in December 1982[2] by John Warnock and Charles Geschke, who established the company after leaving Xerox PARC in order to develop and sell the PostScript page description language. In 1985, Apple Computer licensed PostScript for use in its LaserWriter printers, which helped spark the desktop publishing revolution. The company name Adobe comes from Adobe Creek, which ran behind the house of one of the company’s founders.[2] Adobe acquired its former competitor, Macromedia, in December 2005.
As of January 2007, Adobe Systems has 6,677 employees,[2] about 40% of whom work in San Jose. Adobe also has major development operations in Seattle, Washington; San Francisco, California; Ottawa, Canada, Minneapolis, Minnesota; Newton, Massachusetts; San Luis Obispo, California and in Hamburg, Germany, Noida, India, and Bangalore, India.
Since 1995, Fortune magazine has ranked Adobe as an outstanding place to work. Adobe was rated the fifth-best U.S. company to work for in 2003, sixth in 2004, 31st in 2007 and 40th in 2008.[
