CS 104 - Chapter 2
His phenomenal success at running Pixar and Apple makes Jobs something of a legend in the business world.
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Jobs persuaded Wozniak to quit his job in 1976 to form a company born in Jobs's garage. They marketed the machine as the Apple I.
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The seeds of apple were planted in the early 1970s by Steve Wozniak and Steve Jobs
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When IBM introduced its PC in 1982, it overshadowed Apple's presence in the business world.
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Wozniak created the Apple II, a more refined machine, and in the process invented the first personal computer disk operating system. Because it put computing power within the reach of individuals, the Apple II became popular in businesses, homes, and especially schools.
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Every computer system contains hardware components - physical parts - that specialize in each of these four functions:
1) Input devices 2) Output devices 3) Microprocessor (processor or CPU) 4) Memory (storage devices) These four types of components, when combined, make up the hardware part of a computer system. Of course, the system isn't complete without software - the instructions that tell the hardware what to do.
What are a computers four basic functions?
1) Receive input - computers accept information from the outside world 2) Process information - computers perform arithmetic or logical (decision-making) operations on information 3) Produce output - computers communicate information to the outside world 4) Store information - computers store and retrieve information from memory and storage devices
Peripherals
An external device, such as a keyboard or monitor, connected via cables to the system central processing unit.
Microprocessor
A microprocessor , also called a processor or central processing unit (CPU), is, in effect, the computer's brain. The CPU processes information, performs arithmetic calculations, and makes basic decisions by comparing information values. Now known as a personal computer.
Random Access Memory (RAM)
A storage method that allows information retrieval without regard to the order in which it was recorded. Primary storage.
Input devices
Accept input from the outside world. The most common input devices today are keyboards and pointing devices such as mice and touch pads. Device for accepting computer input, such as a keyboard or scanner.
Wozniak developed the first prototype
At night he designed and constructed a scaled-down computer system that would fit the home hobby-ist's budget. When he completed it in 1975, he offered it to HP, but the company turned it down. Wozniak took his invention to the Homebrew Computer Club where he met Steve Jobs.
Data
Information in a form that can be read, used, and manipulated by a computer.
Memory
Memory and storage devices both store information, but they serve different purposes. The computer's memory (sometimes called primary storage or random access memory (RAM) is used to store programs and data (information) that need to be instantly accessible to the CPU. Storage devices (sometimes called secondary storage), including hard disk drives and a variety of removable media devices, serve as long-term repositories for data. Stores programs and the data they need to be instantly accessible to the CPU. primary storage = RAM secondary storage = storage devices that serve as long-term repositories for data: -hard disk drives -Recordable CD and DVD drives -Tape drives
Processor
Part of the computer that processes information, performs arithmetic calculations, and makes basic decisions based on information values.
Central Processing Unit (CPU)
Part of the computer that processes information, performs arithmetic calculations, and makes basic decisions based on information values. "Brain of the computer"
Output devices
Send information to the outside world. A typical computer uses a video monitor as its main output device, a printer to produce paper printouts, and speakers to output sounds. A device for sending information from the computer, such as a monitor or printer.
Jobs worked with a team of Apple engineers to develop the MacIntosh (Mac), a futuristic computer jobs hoped would leapfrof IBM's advantage.
iPod, iTunes, iPhone, iPad