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Family BASIC is an accessory for the Family Computer (Famicom) created by Hudson Soft and Sharp Corporation. It allowed users to create programs in the BASIC programming language. This accessory came with a special designed cartridge, keyboard, and the Data Recorder, similar in function to that of a Commodore computer of that era.
The keyboard plugs into a 15-pin expansion port on the front of the Famicom and the Data Recorder plugs into the back of the keyboard labeled SAVE and LOAD. If one does not have the Data Recorder or spare cassette tape (or finds cassette tape technology too inconvenient), one can just use the microphone and headphone jacks of a computer or similar device to record the analog signal coming from the keyboard with their preferred audio recording program and then play it back when the game is requesting data to be loaded. 
Three games are compatible with the Data Recorder: