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Copy II Mac is a tool for copying copy protected disks on the Apple Macintosh computer. It also includes MacTools, an enhanced file manager with disk editing and testing abilities.


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Central Point Copy II PC is a disk duplication program that can successfully copy many copy protected disks using only standard IBM PC hardware. It is generally considered the best software-only solution for duplicating such disks. "snatchit".


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CopyWrite is a disk duplicator that can duplicate disks with many advanced copy protection schemes using a standard IBM PC floppy drive and controller.


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Corel Presentations (which is often referred to simply as Presentations) is a presentation program akin to Microsoft PowerPoint and OpenOffice.org Impress.


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Corel Draw is a vector based drawing and illustration program. It is primarily a Windows application, but was ported to Mac OS, Mac OS X, Linux, CTOS and OS/2. It competed against Aldus Freehand, Adobe Illustrator, and Micrografx Designer.


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Correct Grammar is a grammar checking and analysis tool for DOS. Correct Grammar incorporates technology from the Houghton Mifflin CorrectText system.


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CorrectStar, from MicroPro International, is an add-on spell checker for WordStar 3.3. It was sold both bundled with WordStar and separately. Later versions of WordStar integrated the spell checker.


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Cricket Graph, from Cricket Software and later Computer Associates, was a best selling presentation graphics program, and a companion product to CA-Cricket Presents (formerly Xerox Presents). This program can create a variety of graphs, such as line, bar and pie charts. CA-Cricket Presents can then import the graphs in to presentations.


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Dan Bricklin's "Demo" is a tool for creating tutorials, interactive application demonstrations, and interface prototypes. It has a powerful scripting system, with the ability to store and manipulate both text and graphics screens, and a redistributable runtime. author of VisiCalc. Demo was first released in 1985 by Dan Bricklin's consulting firm Software Garden. It was later sold under Peter Norton Computing, and then Sage Software.


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DataEase, from DataEase International Inc., USA., is a fast, easy to use yet powerful, menu-driven relational database development system for the IBM PC. Not copy protected.


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DataPerfect, originally written by Lew Bastian, published through WordPerfect Corp, and later through Novell, was a fast, memory efficient, but capable relational database for DOS. WordPerfect Corp sold the product alongside their other DOS based office products, such as WordPerfect and PlanPerfect. In 1995 Novel released DataPerfect as freeware and development was continued by its original author until about 2008.


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DB Master is a powerful and flexible database for early personal computers. It was produced by Stoneware Inc., and in 1986 it switched ownership to Macon Software Inc.


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Ashton-Tate dBase was an early popular database management system for CP/M and MS-DOS. It was regarded as one of the killer applications for CP/M, and achieved good success. At the time of conception Ashton-Tate was a garage based company but quickly grew.


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dBase Mac, originally developed by a small company named DigiCorp and then marketed by Ashton-Tate under the dBase name, was a unique and powerful database program for the Macintosh. It featured a sophisticated graphical user interface, a procedural programming language, and the ability to access data from other databases and spreadsheets. 1.00 was released in 1987.


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Decision Pad, from Apian Software, is a decision support tool that uses a decision matrix approach. It also supports a three-dimensional decision matrix for group decisions, and can import/export data from Lotus 1-2-3 files. It competed against a similar tool called "Prism".


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DECTalk was a text to speech system used in automated telephone, radio, and TV systems. It was notably used as an artificial voice by Stephen Hawking. Most DECTalk devices were standalone serial devices, however DEC did produce an ISA expansion card for the IBM PC that contained this functionality. This software is required to operate these ISA cards.


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DeltaGraph, originally from DeltaPoint and later SSPS, was a powerful business and scientific statistical graphics package for the Apple Macintosh and Microsoft Windows. graphics-only packages like Excel.


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Derive was a computer algebra and graphing system, developed as a successor to muMATH by Soft Warehouse, Inc. in Honolulu, Hawaii, now owned by Texas Instruments. Derive was implemented in muLISP, also by Soft Warehouse. The first release was in 1988 for DOS. It was discontinued on June 29, 2007 in favor of the TI-Nspire CAS. The last and final version is Derive 6.1 for Windows.


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DESQView, from Quarterdeck, was a DOS application multi-tasker and in later versions functioned as an X client for applications on remote UNIX systems. It competed against IBM Topview. The original DESQ was just a task switcher, but subsequent versions offered preemptive multitasking of well behaved DOS programs on real-mode 8088 PCs. It gained popularity when DESQView 386 added virtual x86 support. This enabled the ability to multi task many poorly behaved programs, and was often used on BBSes due to its excellent COM port handling. It was later overtaken by OS/2 and Windows.


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Diagram-Master, from Decision Resources and later Ashton-Tate, is a graphics tool specifically geared toward making organization and Gantt charts. It can produce very high-quality presentation graphics using laser printers and plotters. Supports CGA, EGA, and the IBM Professional Display. This program was also bundled in the Master Graphics Presentation Pack.


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Direct Access is an easy to use menuing program designed to simplify access to applications on systems with many programs loaded on the hard drive. It is customizable, includes screen blanking, and includes password protection and usage logging. Later versions also detect common programs already installed on the hard disk.


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Disk Technician, from Prime Solutions Inc., is a hard disk utility and surface monitor. It contains an interleave adjuster and pattern tester similar to Spinrite. The Gold version also includes a defragmenter and disk-level virus protection.


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This is a low-end spreadsheet program from Disk-Count software, a vendor notable for their budget software titles. "This program is designed for the first time user with the capability for more advanced users. A spreadsheet is ideal for calculating any set of numbers that you normally would do by hand. Some of the uses are for preparing home budgets, calculating financial payments, tracking car expenses, and creating statistical models."


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DiskClone, from Quarterdeck, is a simple, professional, small, powerful, and easy to use hard disk cloning tool. It can copy a drive to another internal or external drive of different sizes. It can be used as a backup, or a migration tool to a new drive. It all fits on a single floppy disk. "Corporate" editions.


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DiskDoubler is an automated file compression program for the Apple Macintosh. It does not compress the entire drive, but rather specified files. It automatically compresses and recompresses files as you use them.