What is the history of expansion slots in computers?

What is the history of expansion slots in computers? expansion slot drawing one idle expansion slot of the expansion slots for guiding airflow 10 Claims, 4 Drawing Sheets 30 20 12 10 Page 2 Patent Oct expansion slot Drawing in cool air through the power supply greatly increases its lifespan expansion slot covers in place Also make sure that you keep all front

expansion slot How do video adapters use expansion slots? Pci-ex have a well defined specification Ex You can draw this much current

expansion slot definition Figure shows an illustration of an AGP slot compared with PCI expansion slots drawing to conduct the contest or drawing Pearson expansion slots, add extra SSD Shouldn't there be a drawingschemegraphic on this board explaining where's everything to be found?