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the phrase "personal computer" to enter the lexicon and become an identifiable class. @@ -716,6 +718,8 @@ required manual assembly. It was released by Micro Instrumentation Telemetry Systems (MITS) in 1975. It couldn't do much but had expansion capability (memory, teletype interface, casette player for data storage). +![Altair 8800](../img/altair-8800.jpg) + Bill Gates and Paul Allen made a proposal to MITS: they would write software that would allow users to program the Altair in BASIC. They agreed and were prepared to distribute the software. As a result Gates and Allen founded @@ -725,6 +729,8 @@ Around the same time, Steve Wozniak (member of the Homebrew club) built the Apple I as a single-board hobbyist project. He made this available to buy via mail order and formed Apple with Steve Jobs in 1976 to manage the enterprise. +![Apple I](../img/apple1.jpg) + By 1977 they had investment capital and brought out the Apple II. This was sold preassembled with casing and required no soldering. It had expansion slots for third-party vendors to create compatible devices and had colour graphics. @@ -735,6 +741,8 @@ allowed it to run the CP/M OS (created by the company Digital Research) giving ready-made access to software such as a word-processor, spreadsheets and databases. +![Apple 2](../img/apple2.jpg) + Other competitors in the PC market at this time were Radioshack's TRS-80 and the Commodore PET. @@ -745,6 +753,8 @@ real interest. When PCSs started being used by businesses and their capacity grew to include typical business applications (databases, spreadsheets) it sensed an incursion into its market. +![IBM PC](../img/ibm-pc.jpg) + Thus, in 1981, IBM launched the "IBM Personal Computer" which rapidly became the industry standard. This had the effect of legitimising the concept of a PC. There was overwhelming demand. In their marketing IBM melded home and office use