An August 27, 1991, Wall Street Journal article reported that increasing numbers of small software firms are being absorbed by that industry’s biggest companies. According to WSJ, the result of this dominance by a few giants is that the industry has become much tougher for software entrepreneurs to break into. The newspaper printed the chart given in the accompanying figure to depict the breakdown of market share among software companies. Refer to this chart to answer the following questions:

(a) List the companies in descending order of market share.

(b) What is the combined market share for Lotus Development and Word Perfect?

(c) What is the combined market share for Micro soft, Lotus Development, and Novell?

From entrepreneurs to corporate giants: market share among the top 100 software companies, based on total 1990 revenue of $5.7 billion.

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Microsoft Lotus Development Novell WordPerfect Autodesk Ashton-Tate Borland International Adobe Systems Software Publishing Aldus Santa Cruz Symantec Other Source: Soft Letter 100. 12.0% 8.9% | 7.5% 4.2% 4.0% 3.3% 3.0% 2.7% 2.4% 2.1% 1.8% 25.4% 22.7%