The term 'IT COVERS HALF A CALF' can be solved by the word MIDI, which is an acronym for Musical Instrument Digital Interface. MIDI is a technical standard that allows electronic musical instruments, computers and other devices to communicate with each other. It is used to control, sequence, and synchronize electronic musical instruments, such as synthesizers, drum machines, and sequencers. MIDI is also used to create music files, which can be shared and played back on different devices.