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This website had the following on the homepage, "A digital multiplexer selects from a number of inputs and switches it to one output." We viewed that the web page said " Here you find everything about digital multiplexer and its counterpart, the digital demultiplexer." It also said " 11 Experiments - 13 Pictures - 23 Illustrations. A comparator compares two input voltages and gives you, as a result, which of the voltages is higher. It is used in controllers, in analog to digital converters and a frequency counter. Here you find out why. In some cases, the gai." The header had f-alpha.net as the highest ranking search term. It is followed by electronics, chemistry, and physics which isn't as ranked as highly as f-alpha.net. The next words they uses is mathematics. technology was included and could not be viewed by search crawlers.