first successful software product to have gone through a complete life cycle, from conception in 1978 to introduction in 1979 to peak success in 1982 to decline in 1983 to a probable death according to industry insiders in 1984." The magazine added, that the company was slow to upgrade the software, only releasing an Advanced Version of VisiCalc for Apple II in 1983, and announcing one for the IBM PC in 1984. By 1985, VisiCorp was insolvent. Lotus Development acquired Software Arts, and ended sales of the application. Releases 1979: Apple II 1980: Apple III, TRS-80 Model III, Apple II, IBM PC, TRS-80 Model 2, Commodore PET CBM-80, HP 125, Atari 800 1981: IBM PC, Sony SMC-70 1982: Apple III 1983: Enhanced VisiCalc for TRS-80 Model 4, Model II (with RAM expansion card) and Model 16. Used banked memory beyond the base 64 KB. Reception In 1983 Softline readers named VisiCalc tenth overall and the highest non-game on the magazine's Top Thirty list of Atari 8-bit programs by popularity. II Computing listed it second on the magazine's list of top Apple II software as of late 1985, based on sales and market-share data. In its 1980 review, BYTE wrote "The most exciting and influential piece of software that has been written for any microcomputer application is VisiCalc". It concluded, "VisiCalc is the first program available on a microcomputer that has been responsible for sales of entire systems". Creative Computings review the same year similarly concluded, "for almost anyone in business, education, or any science-related field it is ... reason enough to purchase a small computer system in the first place". Compute! reported, "Every Visicalc user knows of someone who purchased an Apple just to be able to use Visicalc". Antic wrote in 1984, "VisiCalc isn't as easy to use as prepackaged home accounting programs, because you're required to design both the layout and the formulas used by the program. Because it is not pre-packaged, however, it's infinitely more powerful and flexible than such programs. You can use VisiCalc to balance your checkbook, keep track of credit card purchases, calculate your net worth, do your taxes—the possibilities are practically limitless." The Addison-Wesley Book of Atari Software 1984 gave the application an overall A+ rating, praising its documentation and calling it "indispensable ... a straight 'A' classic". In 1999, Harvard Business School put up a plaque commemorating Dan Bricklin in the room