Big 20: Connectors
Twenty years ago your computer was probably connected to a peripheral device or network using an ethernet connector, serial, parallel or SCSI cable. Throw in the wires for electricity, ADB ports for mice and keyboards and you had a table full of wires on and under your desk. Ten years ago these wires were replaced by several USB ports connected to a hub. Today most devices are connected to wireless networks. New devices are so small there is barely room for more than a power port.
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