| Microsoft Windows User's Guide, version 3.1, Microsoft, circle icon, p. 358, 1992. |
| 3D home Architect Quick Start Card, Broderbund, outlet tool icon, p. 5, 1993. |
| Microsoft Word Quick Results, Microsolft, image in front icon, p. 28, 1993. |
| Microsoft Windows User's Guide, version 2.0, Microsoft Corp., circle and filled circle icons, p. 48, 1987. |
| Symbol Sourcebook, Van Nostrand Reinhold Co., to find, punched tape reader/writer, stop code, writing-reading diode symbols, p. 61, 1972. |
| Symbol Sourcebook, Van Nostrand Reinhold Co., ecology symbol, p. 57, arena enclosure, community territory, staff lounge symbols, p. 53, 1972. |
| Symbol Sourcebook, Van Nostrand Reinhold Co, stenciled sign, single outlet floor symbols, p. 48, existing trees and running water symbols, p. 51, 1972. |