Mountain Filesafe (1991) 0 DOS

This is the support software and backup utility included with Mountain Computer tape backup systems.

• 5.x

MP/M (1981) 3 CPM

Multi-Programming Monitor Control Program (MP/M) was a multi-user version of CP/M created in 1979. It could run on 8080 or Z80 based computers. Eventually it was ported to the 8086 and was named MP/M-86. It eventually assimilated technology from CP/M-86 and became Concurrent CP/M-86, later evolving into Concurrent DOS.

• 2.x

MS-DOS (1981) 1219 DOS

Originally 86-DOS, written by Tim Paterson of Seattle Computer Products, DOS was a rough clone of CP/M for 8086 based hardware. Microsoft purchased it and licensed it to IBM for use with Microsoft's IBM PC language products. In 1982, Microsoft began licensing DOS to other OEMs that ported it to their custom x86 hardware and IBM PC clones.

• 1.x
• 2.x
• 3.00
• 3.10
• 3.20
• 3.21
• 3.30
• 3.31
• 4.0x
• 5.0

Multi-Job (1984) 0 Utility DOS

Multi-Job is a rudimentary multitasking program for IBM PC-DOS 1.10, 2.00 and 2.10. This gives IBM PC and XT users the ability to run multiple simultaneous jobs and switch between them by pressing ALT-Keypad 1, ALT-Keypad 2, and so on. Programs running in the background must not write directly to the screen.

• 2.x

MultiLink Advanced (1986) 0 Server DOS

Multilink is a multitasking program that turns an IBM PC XT or PC AT into a multi-user, multitasking system supporting up to eight dumb terminals. A good alternative to XENIX on the PC AT.

• 4.00

MultiMate (1983) 6 Word Processor DOS

MultiMate, originally named WordMate, is a word processor designed to mimic the user interface of Wang word processing machines. It was primarily sold to large businesses, but eventually became popular with home users that were familiar with the Wang word processors. Later versions were bundled with extra third party software under the name MultiMate Advantage.

• 3.2x
• 3.3x
• 4.0

Multimate Advantage (1986) 2 Word Processor DOS

MultiMate Advantage is the high-end professional version of MultiMate, targeted at corporate users.

• 3.6
• II 1.0

Multiplan (1983) 4 Spreadsheet DOS MacOS OS2

Microsoft Multiplan was an early 8-bit spreadsheet application for CP/M and MS-DOS with ports to numerous other platforms in the early 80s. Initially it competed against VisiCalc and later Lotus 1-2-3. A companion product, Microsoft Chart, provided graphing support. Multiplan was never ported to Windows, where it was replaced with Microsoft Excel. Excel also replaced Multiplan on the Macintosh platform.

• 1.x
• 1.x (Mac)
• 2.x
• 3.x
• 4.x

Multitasking MS-DOS 4.00 (1985) 5 DOS

Multitasking "MS-DOS 4.00" is a developmental version of MS-DOS that was never released to retail consumers. It was eventually licensed to some companies for internal use. Development started in parallel during the DOS 2.x days, and was intended to be the successor to MS-DOS 3.x. It would have competed against Digital Research's Concurrent DOS.

• 4.00

Music Construction Set (1984) 2 DOS

Music Construction Set is a program that lets you compose "music" using a graphical user interface. It supports 3-voice sound on the IBM PCjr and Tandy 1000, and 4-voice sound via the Model 5150's cassette port!

• IBM 1984
• IBM 1987

MusicPrinter Plus (1988) 0 Media Player DOS

MusicPrinter Plus, from Temporal Acuity Products, Inc, is a musical notation program for MS-DOS. It supports CGA, EGA, and VGA video as well as MIDI playback.

• 1.1

My Advanced MailList (1991) 0 Database DOS

My Advanced MailList is a comprehensive mailing list manager database that supports a wide variety of label formats, embedded graphics, import/export with other databases, and printing POST-NET barcodes.

• 3.x (DOS)

MyBackup (1991) 0 Utility DOS

MyBackup was a low-end, low cost budget title that featured a simplistic, no-frills, easy to use backup utility. It can perform full backups, or backups of selected files. There were versions for DOS and Windows. Presumably based on Finot KeepTrack Plus.

• 1.x (DOS)

MyInvoices (1991) 0 Financial DOS

MyInvoices, from MySoftware Co., is a simplistic low-cost budget application that generates and stores invoices, tracks sales, fees, and time. It was marketed to service-related business individuals. The product is very narrow in scope, and for example, does not track inventory. "MyLabelmaker" and MyCheckbook"

• 1.1.x

MyLabelMaker (1988) 0 Publishing DOS

MyLabelMaker is a low-end budget title that aids in making labels using your printer. It is the perfect way print cards for your Rolodex, or labels for your audio cassettes!

• 1.x

MyTreasures (1991) 0 Database DOS

MyTreasures is a budget database program from My Software that is specifically designed for keeping track of collectibles. It features the ability to sort, print booklets, labels, reports, and Rolodex cards. Perfect for inventorying your baseball cards, coins, or VHS video collection.

• 1.x

NBI Legend (1988) 1 Word Processor DOS Windows

Legend, from NBI, is a document processing program for Microsoft Windows 2.x. It primarily acts as a desktop publishing program, enabling users to lay out frames or embed graphics, but is can also act as a word processor. WordStar International where it became WordStar for Windows.

• 1.x
• Legacy 2.x

NetWare (1989) 64 Other

Novel NetWare was an early and powerful network/file sharing operating system. It was first released in 1983 and supported DOS and CP/M clients and was initially unique in that it shared individual files rather than entire disk volumes. Initially servers ran on a proprietary Motorola 68000 system but quickly changed to IBM PC where it supported a very wide variety of third party hardware. It used a cooperative tasking server environment and had some advanced features usually only found in mainframe products.

• 2.x
• 3.x

Netware Lite (1991) 6 Utility DOS

Netware lite was Novell's low-end networking product. It offered peer-to-peer networking up to 25 machines, used ODI network card drivers, and offered some support for talking to full Novell Netware networks. It was sometimes bundled with DR-DOS. It was followed up by Novell Personal Netware.

• 1.x

NEWS-OS (1989) 3 Unix

NEWS-OS was a variant of BSD (later System version V UNIX) developed by Sony for use on their series of work stations called the Sony NEWS (Network Engineering WorkStation). This machine was a desktop replacement to VAXes in japan, created in 1987. NEWS-OS was designed specifically for use on computer networks, and had support for the TCP/IP protocol, something that wasn't commonly used back in the day but now required for today's machines. Versions 1-4 of NEWS-OS used 4.2BSD as its base. Versions 5 and 6 used UNIX System V 4.2.

• 4.x

NewsMaster (1987) 0 Publishing DOS

NewsMaster, from Unison World, is a primitive low-cost desktop publishing program aimed at home users and low end PCs. It supports both dot-matrix and laser printers. Separate clipart libraries were also available, and it could make use of PrintMaster clipart.

• 1.5

NewWave (1989) 3 Other Windows

HP NewWave is an alternate shell for Microsoft Windows that gives it an icon-object desktop. It attempts to hide the file system from the user, instead presenting them with "objects" that may have many more properties and longer descriptions. It supports a feature called "Hot connects" that automatically updates data across different files.

• A.01.00

NewWord (1983) 2 Word Processor DOS

NewWord is a clone of WordStar created by former MicroPro employees. It filled a gap for WordStar users as WordStar 3.3 went unupdated, and eventually became the basis for WordStar 4.0.

• 1.x

NeXTStep (1987) 21 Unix

NeXTSTEP, from NeXT Computers headed by Steve Jobs, is a Unix based operating system designed to run on m68K NeXT workstations. It later became the basis for OS X, with APIs and concepts preserved today.

• 0.x
• 1.x
• 2.x

Norton Anti-Virus (1990) 0 Utility DOS Windows

Originally written by Symantec and sold as Symantec Antivrus for Macintosh, it became part of the "Norton" branded products sold by Symantec after they acquired Peter Norton Computing. Norton Anti-Virus became a popular product on DOS, Windows, and Macintosh (SAM was renamed to NAV in 1998) and battled the then-new threat of malicious software. In 2015, Symantec unified their security product lineup under the single "Norton Security" product. It was also bundled with Norton SystemWorks.

• 1.0
• 1.5
• 2.0