A computer processor developed by Intel as an upgrade to the 386 processor series and commonly referred to as the 486 or i486. The 80486 has 8k of memory cache built into the processor with 32-bit databus architecture and was available in clock rates ranging from 20MHz to 33MHz. The 486 was available as either a DX or SX, the DX features a built-in coprocessor, the SX does not. A 486SX2 was also available and was capable of doubling the speed.
The 486 was introduced in 1989 and was the first tightly pipelined x86 design as well as the first x86 chip to use more than a million transistors, due to a large on-chip cache and an integrated floating-point unit.
The Intel 4004 is a 4-bit central processing unit (CPU) released by Intel Corporation in 1971. It was the first commercially available microprocessor by Intel. The chip design started in April 1970, when Federico Faggin joined Intel, and it was completed under his leadership in January 1971. The first commercial sale of the fully operational 4004 occurred in March 1971 to Busicom Corp. of Japan for which it was originally designed and built as a custom chip. In mid-November of the same year, with the prophetic ad "Announcing a new era in integrated electronics", the 4004 was made commercially available to the general market. Intel 4004 was the first commercially available single-chip microprocessor in history. It was a 4-bit CPU designed for usage in calculators, or, as we say now, designed for "embedded applications". Clocked at 740 KHz, the 4004 executed up to 92,000 single word instructions per second, could access 4 KB of program memory and 640 bytes of RAM. The Intel 4004 was a part of MCS-4 chipset, which included the following chips:
4001 - 256-bit mask ROM and 4-bit I/O device,
4002 - 320-bit RAM and 4-bit I/O device,
4003 - 10-bit shift register,
4008 and 4009 - standard memory and I/O interface set.
Although the Intel 4004 was a perfect fit for calculators and similar applications it was not very suitable for microcomputer use due to its somewhat limited architecture. The 4004 lacked interrupt support, had only 3-level deep stack, and used complicated method of accessing the RAM. Some of these shortcomings were fixed in the 4004 successor - Intel 4040.
As the first single-chip microprocessor, the Intel 4004 is very popular with CPU collectors and non-collectors. Earlier Intel C4004 CPUs in white ceramic package are sought-after by beginner and intermediate collectors, and are usually sold for hundreds of dollars.
The IBM Personal Computer, commonly known as the IBM PC, is the original version and progenitor of the IBM PC compatible hardware platform. It is IBM model number 5150, and was introduced on August 12, 1981. It was created by a team of engineers and designers under the direction of Don Estridge of the IBM Entry Systems Division in Boca Raton, Florida.
The IBM Personal Computer ("PC") was not as powerful as many of the other personal computers it was competing against at the time of its release. The simplest configuration has only 16K on-board RAM and uses an audio cassette to load and save data - the floppy drive was optional, and a hard drive was not suported.
A basic system for home use attaches to an audio tape cassette player and a television set (that means no floppy drives or video monitor) sold for approximately $1,565. PC-DOS, the operating system, was not available on cassette, so this basic system is only capable of running the Microsoft BASIC programming language, which is built-in and included with every PC.
A more typical system for home or school with a memory of 64K bytes, a single diskette drive and its own display, was priced around $3,000.
An expanded system for business with color graphics, two diskette drives, and a printer cost about $4,500.
This video shows the original Apple Computer, named as "Apple I". The "Apple I computer" was released by the Apple Computer Company in 1976. "Apple I" computers were designed and hand-built by Steve Wozniak, a friend of Steve Jobs. It was demonstrated in July 1976 at the Homebrew Computer Club in Palo Alto, California The owner of the computer store "Byte Shop" was impressed by what he saw and promised to buy 50 fully assembled computers. The Apple 1 went on sale in July 1976 at a price of US$666.66 About 200 units were produced. Apple I computers contributed significantly to the microcomputer revolution. The Apple I was a fully assembled circuit board containing more than 60 chips. However, to make a working computer, users still had to add a case, power supply transformers, power switch, ASCII keyboard, and composite video display. Steve Wozniak built the Apple I to run BASIC, so games could be programmed and played on it. It was a game machine for the most part. It had 6502 Microprocessor and 8KB RAM. The peripheral equipment such as power pack, keyboard, monitor and cassette recorder had to be obtained personally by the user. And, Apple I computer production was discontinued in September 1977. Right now, only few Apple 1 computers are available in working condition. So, they are selling at very high price through auctions.
Apple Computer 1, also known later as the Apple I, or Apple-1, is a desktop computer released by the Apple Computer Company (now Apple Inc.) in 1976. It was designed and hand-built by Steve Wozniak. Wozniak's friend Steve Jobs had the idea of selling the computer. The Apple I was Apple's first product, and to finance its creation, Jobs sold his only motorized means of transportation, a VW Microbus, for a few hundred dollars, and Wozniak sold his HP-65 calculator for $500; however, Wozniak said that Jobs planned to use his bicycle if necessary. It was demonstrated in July 1976 at the Homebrew Computer Club in Palo Alto, California.
Steve "Woz" Wozniak was an engineer at Hewlett-Packard, and loved computers. He was relatively poor, but always wanted his own computer to play around with. Being rather intelligent, he had been designing his own computer for years, but never actually got around to making one.
Encouraged by the other computers entering the market, he created his masterpiece, and took it to the Homebrew Computer Club in Palo Alto California to show it to some of the other members.
His friend and fellow Homebrew Computer Club member Steve Jobs loved it, but had a few improvement in mind. He also wanted to see if they could sell some and make a few dollars.
Steve W. and Steve J. got some money together and had some printed circuit boards made, then planned to sell the computer as a kit. This is also when they officially formed the "Apple Computer Company" - Jobs used to work in an apple orchard.
Jobs approached a local computer store, The Byte Shop, to see if they would be interested in selling their Apple 1 computer. They said "Sure, we'll take fifty fully assembled units." They sold them all.
Only about 200 Apple 1 computers were made in total. Excited by their success, Woz went on to design the Apple II - one of the greatest computers of all time.
