Editing Timeline of computing 1980–1989 (section)

==1988==
{| class="wikitable sortable"
! Date
! Location
! class="unsortable" | Event
|- valign="top"
| January
| Italy
| Foundation of the [[MPEG]] group by [[Leonardo Chiariglione]] and [[Hiroshi Yasuda]].
|- valign="top"
| 16 June
| US
| 80386SX was released as a cheaper alternative to the 80386DX. It had a narrower (16 bit) time multiplexed bus. This reduction in pins, and the easier integration with 16 bit devices, made the cost savings.
|- valign="top"
| July–<br>August
| US
| PC DOS 4.0, MS-DOS 4.0<br>
Version 3.4{{snd}}4.x are confusing due to lack of correlation between IBM and Microsoft and also the US and Europe. Several 'Internal Use only' versions were also produced.

This version reflected increases in hardware capabilities; it supported hard drives greater than 32 MB (up to 2 GB) and also EMS memory.

This version was not properly tested and was bug ridden, causing system crashes and loss of data. The original release was IBM's, but Microsoft's version 4.0 (in October) was no better and version 4.01 was released (in November) to correct this, then version 4.01a (in April 1989) as a further improvement. However many people could not trust this and reverted to version 3.3 while they waited for the complete re-write (version 5{{snd}}3 years later). Betas of Microsoft's version 4.0 were apparently shipped as early as 1986–1987.
|- valign="top"
| September
| US
| IBM PS/2 Model 30 286 released, based on an 80286 processor and the old AT bus{{snd}}IBM abandoned the MCA bus, released less than 18 months earlier. Other IBM machines continued to use the MCA bus.
|- valign="top"
|rowspan="2"| October
| ?
| Common Access Method committee (CAM) formed. They invented the [[Parallel ATA|ATA]] standard in March 1989.
|- valign="top"
| US
| Macintosh IIx released. It was based on a new processor, the Motorola 68030. It still ran at 16&nbsp;MHz but now achieved 3.9 MIPS. It could be expanded to 128 MB of RAM and had 6 NuBus expansions slots.
|- valign="top"
| November
| US
| [[MS-DOS 4.01]], PC DOS 4.01<br>
This corrected many of the bugs seen in version 4.0, but many users simply switched back to version 3.3 and waited for a properly re-written and fully tested version{{snd}}which did not come until version 5 in June 1991. Support for disk partitions &gt;32 MB. 
|- valign="top"
| ?
| ?
| First [[Optical computing|optical chip]] developed, it uses light instead of electricity to increase processing speed.
|- valign="top"
| ?
| ?
| [[Extended memory|XMS]] Standard introduced.
|- valign="top"
| ?
| ?
| [[Extended Industry Standard Architecture|EISA]] Bus standard introduced.
|- valign="top"
| ?
| US
| [[Write once read many|WORM]] (Write Once Read Many times){{snd}}disks marketed for first time by IBM.
|- valign="top"
| ?
| US
| [[Adobe Photoshop]] software created.<ref name=Kirschenbaum2013 />{{clarify|date=June 2021|reason=Began development or released?}}
|}