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ThoughtWare's Jingle Disk was a stocking stuffer for the computer geek in 1986. It plays several pieces of music on the PC speaker as it animates several winter images. It can also print a simple greeting card to a dot matrix printer using these images. While there were similar shareware or freeware programs, this was a commercial program


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The JLaser is a hardware memory expansion board for IBM PCs and clones indented to help operate new memory-hungry laser printers. The software also translates regular DOS text output in to formatted PCL. Notably, it contains a driver for Microsoft Windows 1.x/2.x.


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Key HomeInventory is a budget title targeted at home users. It consists of a simple database specifically for inventorying items in ones home.


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SoftKey Key Paint 2000 is a rebadged version of ZSoft PC Paintbrush for DOS. ZSoft was eventually purchased by SoftKey.


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KeyCad Complete, from Softkey, is a low-end computer aided design and drawing tool.


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KeyMailer is a professional and easy to use mailing list managment program.


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LIMSIM is a relatively easy-to-use commercial program for 286 based and later computers that emulates paged EMS memory using standard 286/386 XMS memory.


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Logictree, From CAM Software, is an easy to use Expert System program that makes decisions based on a programmed "tree" of information.


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Lotus 1-2-3 was an early spreadsheet application available for MS-DOS. It became extremely popular in the late 1980s, displacing the former leader VisiCalc. Lotus had difficulties adapting 1-2-3 to the Windows environment, and was overtaken by Microsoft Excel. Spreadsheet functionality was also included in Lotus Symphony. Later versions were included in Lotus SmartSuite.


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Lotus Approach, originally from Approach Software Corporation, is a relational database management system. Approach promises "instant productivity" with its WYSIWYG form and report designer, and is compatible with many existing database formats. Approach started off as an independent product, was purchased by Lotus, and later IBM. It was included in Lotus SmartSuite for Microsoft Windows.


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Lotus HAL (Human Access Language) is a natural-language querying interface for Lotus 1-2-3 r2. That is, one can enter standard English phrases instead of typing "complex" formulas.


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Improv is a spreadsheet program that attempted to re-imagine how one would create and interact with spreadsheets. It was first released in 1991 for NeXT computers, and for a time became one of the NeXT's "Killer Apps". In 1993 Lotus released Improv 2.0 for Microsoft Windows. It was not marketed as a direct replacement to Lotus 1-2-3, and 1-2-3 remained dominant until both were overtaken by Microsoft Excel.


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Lotus Symphony is a an integrated software program that combines five tools: spreadsheet - word processing, graphics, database management, and data communications - in one package. The spreadsheet has similar functionality to Lotus 1-2-3, however it uses a different software "engine". These releases are of the original suite produced by Lotus. For the unrelated suite produced by IBM under the same name, see "IBM Lotus Symphony".


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Formerly Electric Desk/AlphaWorks from Alpha Software, Lotus Works is an all in one office suite for DOS that includes a word processor, spell check, spreadsheet, graphics, database, and communications. It targeted the lower end and first time computer buyers. It competed against other all in one office suites such as FrameWork, PFS First Choice, and Microsoft Works


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Lucid 3-D, created by PCSG, Inc. and sold by DacEasy, Inc., is a spreadsheet program for MS-DOS. The feature that sets it apart from others is that it is memory-resident, so you can bring it up on top of other DOS programs and exchange data with them. Unlike simple TSRs, however, Ludid 3D is a full featured spreadsheet. It features linking, macros, windowing, intelligent recalculation, background recalculation, and user-definable functions.


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Lumina is a comprehensive, feature-packed, high resolution, high-end graphics drawing system targeted at professional computer artists. It requires the use of high resolution displays and graphics tablets. Time Arts also produced video and tablet hardware as well as complete computer systems.


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Map-Master is a map generation and plotting tool that includes state map boundaries, statistical information, and areas within states. It support outputting maps to a number of high resolution plotting devices. Additional map data was available for purchase from Decision Resources.


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The Ashton-Tate Master Graphics Presentation Pack is a bundle of Ashton-Tate's graphics programs. This includes Chart-Master, Diagram-Master, and Sign-Master. These appear identical to the standalone versions, the only different is the inclusion of a unified menu disk.


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Mathcad is computer software primarily intended for the verification, validation, documentation and re-use of engineering calculations.


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MatLab is a high speed, interactive programming utility for manipulating, calculating, and plotting complicated mathematical equations. It is considered easy to use for those familiar with typical algebra equations.


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PC-Draw is a vector based drawing program for DOS. You can use it to make diagrams, schematics, charts, and drawings. It has optional support for plotters and light pens.


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MicroPro DataStar is a general purpose forms based desktop database for early IBM PCs and compatibles. It is often used in conjunction with ReportStar and sometimes bundled as InfoStar. MicroPro products were commonly bundled with OEM systems.


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MicroPro ReportStar is a report generator for DOS used in conjunction with DataStar and sometimes bundled as InfoStar.


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Microsoft LISP, originally developed by Soft Warehouse, of Honolulu,is a high-speed LISP interpreter sold alongside Microsoft’s other language products. LISP is a programming language based around symbolic expressions. It was used to develop expert systems and "artificial intelligence" systems. Microsoft LISP features a large number of native functions and includes a debugger.