Macintosh Plus and LaserWriter Plus introduced.
Apple and Steve Jobs reach out-of-court settlement.
Applied Engineering introduces the Transwarp accelerator for the Apple II.
Mac System 3.0, Finder 5.1 (System Software 0.7) released. This version introduced further speed increases, but more importantly replaced the Macintosh Filing System (MFS) with the Hierarchical Filing System (HFS) to better support nested folders (subdirectories), a necessity for the new Apple HD20 hard drive.
Steve Jobs sells all but one share of his Apple stock, leaving Mike Markkula as the largest shareholder.
Central Point Software introduces the Laser 128 computer ($395). It is similar to the Apple IIc, but includes a single expansion slot and a numeric keypad.
Mac System 3.2, Finder 5.3 (System Software 1.1) released, primarily fixing bugs, and updating the Chooser and the Calculator desk accessory.
AppleWorks Forum begins publication.
Apple IIGS and Apple 3.5 Drive introduced ($999) on September 15, 1986., 
Apple IIc Memory Expansion version introduced, with IIc Memory Expansion card. Apple IIe 128K price reduced.
Apple II SCSI controller card and Apple Hard Disk 20SC introduced.
Apple RGB Monitor ($499), Apple Monochrome Monitor ($129), and AppleColor Composite Monitor ($379) introduced.
ProDOS 16 v1.0 introduced; original ProDOS becomes ProDOS 8 v1.2.
Apple Programmer’s and Developer’s Association (APDA) created.
Penguin Software, a pioneer in removal of copy protection, is forced by Penguin Books to change its name. The company chooses “Polarware”.
ProDOS 8 v1.3
Platinum Apple IIe with built-in keypad introduced ($829).
II Computing ceases publication.
Mac System 3.3, Finder 5.4 (System Software 2.0) released, introducing AppleShare networking software to the Mac operating system.
Commodore Amiga 500 announced.
Apple II SCSI Card revision B released (fixes problems encountered when trying to use the card on the IIGS).
Macintosh SE and Macintosh II introduced.
Commodore Amiga 2000 released.
ProDOS 8 v1.4
IBM PS/2 line introduced, with the first version of their OS/2 operating system.
Microsoft Windows 2.0 released.
Mac System 4.1, Finder 5.5 (System Software 2.01) released, adapting the Mac to be better able to use hard drives larger than 32 meg in size, and including other features to support the new Macintosh II.
Apple IIGS System Software v2.0 
AppleFest ’87 held in Boston.
Pecan Software releases FORTRAN for the Apple IIGS.
Claris, a software company spun-off from Apple, is announced. It will handle AppleWorks and Macintosh software previously sold by Apple.
Apple IIGS ROM 01 upgrade.
The Apple II Review changes its name to The Apple IIGS Buyer’s Guide.
AppleFest ’87 held in San Francisco.
Beagle Bros introduces the TimeOut series of enhancements for AppleWorks.
Mac System 4.2, Finder 6.0 (System Software 5.0) released, supporting the new color Macintosh models, adding the MultiFinder (allowing switching between running applications), and background printing with the LaserWriter printer.
Applied Engineering introduces the PC Transporter.
Apple IIGS System Software v3.1 released. It is the first version with the Finder.
II Computing ceases publication.
Apple IIc Revised Memory Expansion version released.
Apple’s LaserWriter II family introduced.
Timeworks introduces Publish-It!, the first serious desktop publishing program for the Apple II.
AppleCD SC (CD-ROM drive, $1199) introduced for both the Macintosh and Apple II. Also introduced were the Apple II SCSI Card Rev C (supporting partitioning on large capacity disk drives), and the Apple II Workstation Card ($249) to allow the Apple IIe to connect to AppleTalk.
Tom Weishaar (of Open-Apple) begins as manager of the Apple II Roundtables on the GEnie online service.
VTech releases the Laser 128 EX.
ProDOS 8 v1.5.
CyberAIDS virus written.
Apple introduces AppleLink-Personal Edition, run by Quantum Computer Services, at AppleFest ’88 in Boston.
Apple Assembly Line ceases publication.
Zip Technologies introduces the Zip Chip at AppleFest. It is a 4 MHz accelerator on a single chip.
ProDOS 8 v1.6.
Festering Hate virus written.
Mac System 6.0 released, featuring improvements to the MultiFinder and LaserWriter drivers, and support for the SuperDrive.,
Apple IIGS System Software v3.2; it is the first version that can boot over an AppleTalk network., 
ProDOS 8 v1.7.
Quantum Computer Services starts PC-Link, an online service for PC users.
VTech releases the Laser 128 EX/2.
Apple IIGS System Software v4.0 introduced. It is the first version to be called GS/OS, and is written entirely in 16-bit code.
Apple IIc Plus introduced ($675, or $1099 with color monitor) at AppleFest ’88 in San Francisco.
Macintosh IIx and FDHD (SuperDrive) introduced.
Zip Chip finally available for shipment.
Claris, having bought the rights to StyleWare’s program GS-Works, modifies and releases it as AppleWorks GS.
AppleLink Personal Edition starts service.
Applied Engineering introduces the Transwarp GS accelerator.
A.P.P.L.E. (Apple Pugetsound Program Library Exchange) changes it official name to TechAlliance; among other reasons is Apple Computer’s dislike of other companies using “their” name.
Open-Apple changes its name to A2-Central for similar reasons.
UpTime disk magazine ceases publication, purchased by Softdisk.
Apple Computer purchases the Apple Programmers and Developers Association (APDA) from A.P.P.L.E. Co-op.
Steve Jobs announces the NeXT computer.
At CERN (“Centre European pour la Recherche Nucleaire”, or European Laboratory for Particle Physics) in Geneva, Switzerland, Tim Berners-Lee submits a paper “Information Management: A Proposal”, which forms the theoretical basis for the function of hypertext links on the Internet.
Mac System 6.0.3 released, the first stable version of System 6.
Apple II Video Overlay Card introduced.
Roger Wagner Publishing releases HyperStudio, the first Apple IIGS hypermedia product.
A+ and inCider merge to become inCider/A+.
ProDOS 8 v1.8.
BASIC.SYSTEM v1.3 (It was a buggy version, however, that had to be soon replaced).
Claris announces AppleWorks 3.0.
The Source is sold to CompuServe.
Apple Computer pays $2.5 million to Quantum Computer Services to recover the rights to use of the Apple logo for an online service.
First A2-Central Developer’s Conference.
Apple IIGS System Software v5.0 released.
Load Runner virus appeared.
Apple IIGS ROM 03 introduced.
The Source is shut down, and customers are offered a credit to join CompuServe.
GS+ begins publication.
Macintosh Portable and Macintosh IIci introduced.
AppleLink Personal Edition is renamed “America Online”.
Burp virus appears.
Softdisk G-S begins publication.
Apple IIGS System Software v5.0.2 released.
Lol, I just got an AppleColor composite monitor at a yard sale, for FREE, literally, I asked the owner how much it was and he said, “Just take it” so when I found out it was worth 379 dollars, i FREAKED OUT.
Well, $379 is what it cost back in 1986 when it was new. Today, I seriously doubt you would be able to sell it (except perhaps to a collector) for anywhere near that amount. The Apple IIe was worth $999 when it was new; you can get it for far less today.