OVERHEADS SET 2: DESIGN OF INTERACTIVE SYSTEMS

Some of the earliest signs in western civilization were the "house-marks" which denoted ownership of items by a family. They were carved in the wood owned and harvested, the livestock were branded with it, and tools and other possessions were labeled with the marks. Mystic Signs (Masonic/Dollar Bill) PROFESSIONAL SIGNS. Families of Signs (powerful) ................
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