* The DOS operating system was the primary operating system for the Apple Computer's Apple II family of computers, from 1979 with the introduction of the floppy disk drive, until 1983 with the introduction of ProDOS ; many people continued using it long after that date.

It was one of the first commercial games to use the ProDOS operating system.

Initial versions of the System Software were based on the ProDOS 16 operating system, which was based on the original ProDOS operating system for 8-bit Apple II computers.

Although it was modified so that 16-bit Apple IIGS software could run on it, ProDOS 16 was written largely in 8-bit code and did not take full advantage of the IIGS's capabilities.

It was usually used with the ProDOS file system ( which was the only one from which it could be booted ), but GS / OS also supported a variety of other file systems, including the Hierarchical File System used by the Mac OS.

Another advantage of GS / OS over ProDOS 16 was that it was written in 16-bit code for the 65816 processor used in the II, rather than primarily in 8-bit 6502 machine code that did not take advantage of the II's unique features.

This was made possible as the SuperDrive now utilitized the same MFM ( Modified Frequency Modulation ) encoding scheme used by the IBM PC, yet still retained backward compatibility with Apple's variable-speed zoned CAV scheme and Group Code Recording encoding format, so it could continue to read Macintosh MFS, HFS and Apple II ProDOS formats on 400 / 800K disks.

Mechner was able to recover the source code of the Prince of Persia game from recently found 23 years old 3. 5 ″ Apple ProDOS floppy disks and posted it online.

Spellevator had a utility on the disk's flipside that let a user create a word list and save it to any ProDOS formatted floppy disk.

The SuperDrive could read and write to Macintosh, MS-DOS, OS / 2, and ProDOS disks.

* June: The Festering Hate Apple ProDOS virus spreads from underground pirate BBS systems and starts infecting mainstream networks.

Some design features from the ill-fated Apple III lived on in the Apple IIGS, such as GS / OS borrowing elements from SOS ( including, by way of ProDOS, the SOS filesystem ), a unique keyboard feature for dual-speed arrow keys, and colorized ASCII text.

The IIGS could run all of Apple's earlier Apple II operating systems: Apple DOS, ProDOS 8, and Apple Pascal.

Later System Software versions ( starting with version 4. 0 ) replaced ProDOS 16 with a new 16-bit operating system known as GS / OS.

( In comparison, ProDOS always loads into language card RAM, thus requiring at least a 64 kB machine.

Since Apple ProDOS uses the same file system as SOS, and since ProDOS stores its own boot code in block number zero rather than block number one, SOS and ProDOS can co-exist on the same medium.

GS / OS is an operating system developed by Apple Computer for its Apple II personal computer that uses the ProDOS filing system.

GS / OS included a facility known as File System Translators ( FSTs ) which allowed it to support multiple on-disk file systems in a manner transparent to application programs, a feature not found in ProDOS or most other microcomputer operating systems at the time.

Other File System Translators included those for MS-DOS, High Sierra / ISO-9660, Apple ProDOS, DOS 3. 3 and Pascal, albeit read-only ( full read / write support had been planned but never completed ).

It also extended the ProDOS file system to provide for resource forks on files similar to those used on the Apple Macintosh, which allowed for programs to be written in a more flexible way.

The big change from the previous versions of ProDOS is that GS / OS incorporated many features of the Macintosh System 5.

Less assured than the tall, wide-shouldered man in the lead, Cobb followed alertly, a hand on his gun butt.

On December 20, 1860, South Carolina took the lead by adopting an ordinance of secession ; by February 1, 1861, Florida, Mississippi, Alabama, Georgia, Louisiana, and Texas followed.

A first US IPO followed in 1989 after Ben Rosen joined the Borland board with Goldman Sachs as the lead banker and a second offering in 1991 with Lazard as the lead banker.

Several of the Commonwealth nations followed the British lead and sourced buses from British manufacturers, leading to a prevalence of double-decker buses.

Foley's attack was followed by Hood in Zealous, who also crossed the French line and successfully anchored next to Guerrier in the space Foley had intended, engaging the lead ship's bow from close range.

The next three British ships, Vanguard in the lead followed by HMS Minotaur and HMS Defence, remained in line of battle formation and anchored on the starboard side of the French line at 18: 40.

During this period, the marketing department followed the lead of Detroit automobile manufacturers and came up with many marketing slogans and buzzwords to describe Cessna ’ s product line in an attempt to place their products ahead of the competition.

Hence, for the lead this would be two counts with the weight on the left leg while the right leg moves, two counts with weight on the right leg while the left leg moves, followed by a quick step onto the left and then a quick step onto the right.

Chambers, in 1728, followed the earlier lead of John Harris's Lexicon Technicum of 1704 and later editions ( see also below ); this work was by its title and content " A Universal English Dictionary of Arts and Sciences: Explaining not only the Terms of Art, but the Arts Themselves ".

Severe fires can lead to significant further erosion if followed by heavy rainfall.

Typically thin sections are stained for several minutes with an aqueous or alcoholic solution of uranyl acetate followed by aqueous lead citrate.

It would be the band's final album of all-new material, and lead singer Holly Johnson would leave the band following the corresponding world tour, followed by a flurry of lawsuits from ZTT.

However, most chemists followed Kekulé's lead in pursuing and developing what some have called " classical " structure theory, which was modified after the discovery of electrons ( 1897 ) and the development of quantum mechanics ( in the 1920s ).

The film was followed by a theatrical film sequel, Ghost in the Shell 2: Innocence, produced in 2004, which was also directed by Oshii and places the character of Batou in the lead role.

Except for the short-lived neutrality declared by the anti-Soviet leader Imre Nagy in November 1956, Hungary's foreign policy generally followed the Soviet lead from 1947 to 1989.

Other studios followed Universal's lead.

In 1967 the Holt government made the historic decision not to depreciate the Australian dollar in line with Britain's depreciation of the pound sterling, a custom that Australia had previously always followed, but this decision created considerable dissent within the Coalition ; Country Party leader John McEwen was particularly angered by the move — he saw it as a threat to Australia's balance of payments and feared that it would lead to increased production costs for primary industry.

In 1991, he embarked on a serious acting career, portraying police detective Scotty Appleton in Mario Van Peebles ' feature film New Jack City, gang leader Odessa ( alongside Denzel Washington and John Lithgow ) in Ricochet ( 1991 ), gang leader King James in Trespass ( 1992 ), followed by a notable lead role performance in Surviving the Game ( 1994 ), in addition to many supporting roles, such as J-Bone in Johnny Mnemonic ( 1995 ), and the marsupial mutant T-Saint in Tank Girl ( 1995 ).

In Paris, Gris followed the lead of another friend and fellow countryman, Pablo Picasso.

According to the Pakistan Telecommunication Authority ( PTA ), Mobilink continues to lead the market with 35. 7 million subscribers, followed by Telenor with 29. 3 million, Ufone with 23. 1 million, Zong with 15. 6 million, and Warid Telecom with 14. 3 million.

Dylan's lead was also followed by The Byrds, joined by Gram Parsons to record Sweetheart of the Rodeo ( 1968 ), helping to define the genre of country rock, which became a particularly popular style in the California music scene of the late 1960s, and was adopted by former folk rock artists including Hearts and Flowers, Poco and New Riders of the Purple Sage.

With loud walls of sound, where individual instruments and even vocals were often indistinguishable, they followed the lead of noise pop and dream pop bands like My Bloody Valentine ( often considered as the earliest shoegaze act ), The Jesus and Mary Chain, and the Cocteau Twins.

Again, other laptop manufacturers quickly followed Apple's lead.