A block in Xcos with a red input port denotes?

How do you unlock a windows 7 home premium PC? Your computer does not know what account to open programs with? Can rats eat people's candy without getting sick? What show was on TMF that had a character called the gimp? Is 15 gallons bigger or smaller than 50 liters? Where can one get cartridges for printers? What was the method of sharing files between computers before networks were invented? How do I open my phone to view its files in Windows 8? What is the role of software in colossos? What is meant by management process? Are the most commands located on the home tab? How do you record my voice on on Toshiba satellite laptop? Why does my router keep rebooting when I try to access Wifi I can connect to it fine via a wired connection but when I try to use my laptop on WiFi it automatically shuts down the router? How many pounds of water is in a gallon? Whats the best and cheapest way to protect a computer from viruses? Where does Excel display data as it is typed? What do you call the unique character of a line in art? What is the cheapest laptop available at Walmart? How any qt 1 gallon? How do you convert 10 megabytes to kilobytes?