Depends on your definition of a computer. An abacus could be somewhat considered a computer in some people's opinion. The Zuse Z3 was the world's first programmable automated machine, and was designed by Konrad Zuse and completed in 1941 in Germany. The first commercial digital computer was The Zuse Z4.
If your def of a computer requires a Graphical User Interface and mouse, the first would be the Xerox Alto in 1973. It wasn't commercial, but used by Xerox and Universities. The first commercial computer with a GUI and mouse is the Macintosh made by Apple in 1984.
Lots of people over a very long period of time. The very first "computer" in the broadest modern sense was a programmable loom invented in the 1800s by a man named Joseph Jacquard.
The modern microprocessor computer was first marketed by Intel, but other research labs were working at the same time to bring microprocessors to market as well, such as Texas Instruments.
Major Companies Influential in developing the modern computer include:
IBM
Intel
Microsoft
Xerox
Apple
Sun
Cisco
Innumerable scientists, researchers, engineers, and enthusiasts helped create the computer revolution over the last 100 years.
The Windows Operating System was invented by Bill Gates the founder of Microsoft.
Apple Computers were invented by Steve Jobs and Steve Wozniak.
Android was invented out of a consortium that was trying to create an open-source mobile OS that was later bought by Google.
iOS was created by developers at Apple as an extension of the Mac operating system for mobile devices.
Eggerland - Family Computer Disk System - was created on 1987-01-29.
actually operating system intermediary between user of the computer and hardware of the computer that's why operating system was created to provide proper functioning of computer hardware and to satisfy user requirements in this multi-programming environment .
Gjon Smith
The Macintosh Operating System (Mac OS) was created to provide an operating system for the Macintosh computer.
the first computer to use operating system was mark1
An environment (created by an emulation software) where an other computer's operating system (as well as its programs) can be run.
Xerox
Bill Gates, the founder of the Microsoft Corporation.
U.S. Department of Defense
Virtual Machine
A PHP computer system is simply a set of computers using the PHP programming language. It is used in over 200 million websites currently and was created in 1995.
Algebra systems were created in the 1960's, but more specifically MATHLAB was created in 1964. More easily known as computer algebra systems (CAS). A gentleman called Carl Engelman was the creator of this system and has become quite well known for this system this is popular know for taking mathematical equations and transforming them into a symbolic form.