Editing Wintel (section)

== Competitors ==
Industry competitors took one of several approaches to the changing market. Some (such as [[Apple Inc.|Apple]], [[Amiga]], [[Atari]], and [[Acorn Computers|Acorn]]) persevered with their independent and quite different systems. Of those systems, Apple's [[Mac (computer)|Mac]] is the only one remaining on the market. Others (such as [[Digital Equipment Corporation|Digital]], then the world's second-largest computer company, Hewlett-Packard, and [[Apricot PC|Apricot]]) concentrated on making similar but technically superior models. Other early market leaders (such as Tandy-Radio Shack or Texas Instruments) stayed with outdated architectures and proprietary operating systems for some time before belatedly realizing which way market trends were going and switching to the most successful long-term business strategy, which was to build a machine that duplicated the IBM PC as closely as possible and sell it for a slightly lower price, or with higher performance. Given the very conservative engineering of the early IBM personal computers and their higher than average prices, this was not a terribly difficult task at first, bar only the great technical challenge of crafting a [[BIOS]] that duplicated the function of the IBM BIOS exactly but did not infringe on copyrights.

The two early leaders in this last strategy were both start-up companies: [[Columbia Data Products]] and [[Compaq]]. They were the first to achieve reputations for very close compatibility with the IBM machines, which meant that they could run software written for the IBM machine without recompilation. Before long, IBM had the best-selling personal computer in the world and at least two of the next-best sellers were, for practical purposes, identical.

For the software industry, the effect was profound. First, it meant that it was rational to write for the IBM PC and its clones as a high priority, and port versions for less common systems at leisure.

Second (and even more importantly), when a software writer in pre-IBM days had to be careful to use as plain a subset of the possible techniques as practicable (so as to be able to run on any hardware that ran CP/M), with a major part of the market now all using the same exact hardware (or a very similar clone of it) it was practical to take advantage of any and every hardware-specific feature offered by the IBM.

Independent BIOS companies like [[Award Software|Award]], [[Chips and Technologies]], and [[Phoenix Technologies|Phoenix]] began to market a [[clean room design|clean room]] BIOS that was 100% compatible with IBM's, and from that time on any competent computer manufacturer could achieve IBM compatibility as a matter of routine.

From around 1984, the market was fast growing but relatively stable. There was as yet no sign of the "Win" half of "Wintel," though Microsoft was achieving enormous revenues from DOS sales both to IBM and to an ever-growing list of other manufacturers who had agreed to buy an MS-DOS license for every machine they made, even those that shipped with competing products. As for Intel, every PC made either had an Intel processor or one made by a second source supplier under license from Intel. Intel and Microsoft had enormous revenues, Compaq and many other makers between them made far more machines than IBM, but the power to decide the shape of the personal computer rested firmly in IBM's hands.

In 1987, IBM introduced the [[IBM PS/2|PS/2]] computer line. Although the [[open architecture]] of the PC and its successors had been a great success for them, and they were the biggest single manufacturer, most of the market was buying faster and cheaper IBM-compatible machines made by other firms. The PS/2s remained software compatible, but the hardware was quite different. It introduced the technically superior [[Micro Channel architecture]] bus for higher speed communication within the system, but failed to maintain the open AT bus (later called the [[Industry Standard Architecture|ISA bus]]), which meant that none of the millions of existing add-in cards would function. In other words, the new IBM machines were not IBM-compatible.

Further, IBM planned the PS/2 in such a way that for both technical and legal reasons it would be very difficult to clone. Instead, IBM offered to sell a PS/2 licence to anyone who could afford the royalty. They would not only require a royalty for every PS/2-compatible machine sold, but also a payment for every IBM-compatible machine the particular maker had ever made in the past.

Many PC manufacturers signed up as PS/2 licensees. (Apricot, who had lost badly by persevering with their "better PC than IBM" strategy up until this time, was one of them, but there were many others.) Many others decided to hold off before committing themselves. Some major manufacturers, known as the [[Extended Industry Standard Architecture|Gang of Nine]], decided to group together and decide on a bus type that would be open to all manufacturers, as fast as or faster than IBM's Microchannel, and yet still retain [[backward compatibility]] with ISA.

This was the crucial turning point: the industry as a whole was no longer content to let IBM make all the major decisions about technical direction. In the event, the new [[Extended Industry Standard Architecture|EISA]] bus was itself a commercial failure beyond the high end: By the time the cost of implementing EISA was reduced to the extent that it would be implemented in most desktop PCs, the much cheaper [[VESA Local Bus]] had removed most of the need for it in desktop PCs (though it remained common in servers due to for example the possibility of data corruption on [[hard disk drive]]s attached to VLB controllers), and Intel's [[Peripheral Component Interconnect|PCI]] bus was just around the corner. But although very few EISA systems were sold, it had achieved its purpose: IBM no longer controlled the computer industry. IBM would belatedly amend the PS/2 series with the [[IBM PS/ValuePoint|PS/ValuePoint]] line, which tracked the features of the emerging ''[[ad hoc]]'' platform.

At around this same time, the end of the 1980s and the beginning of the 1990s, Microsoft's [[Microsoft Windows version history|Windows]] operating environment started to become popular, and Microsoft's competitor [[Digital Research]] started to recover a share of the DOS press and DOS market with [[DR-DOS]]. IBM planned to replace DOS with the vastly superior [[OS/2]] (originally an IBM/Microsoft joint venture, and unlike the PS/2 hardware, highly backward compatible), but Microsoft preferred to push the industry in the direction of its own product, Windows. With IBM suffering its greatest ever public humiliation in the wake of the PS/2 disaster, massive financial losses, and a marked lack of company unity or direction, Microsoft's combination of a soft marketing voice and a big financial stick was effective: Windows became the [[De facto standard|''de facto'' standard]].

For the competing computer manufacturers, large or small, the only common factors to provide joint technical leadership were operating software from Microsoft, and CPUs from Intel.