computer copy copyspace device display graphic graphics illustration it lcd monitor output screen space tft tv wallpaper 3D bunch cable chrome electric guitar input jack lead metal music plug plugged reflections sound stereo wire apple black blue business computer monitor accessory desktop electronic flat imac isolated object panel technology white work add adding-machine addition appearance bulky buttons calculate calculating calculations calculators clear Clearance computers computing digits handle heavy large limitations limited machine numbers numerals office office-equipment predating press pressing problem-solving problems slow subtract subtraction 1960’s-70’s automated-machinery cards collections computer-punch-cards data-encoding data-input data-output data-processing-industry data-storage decks-of-cards digital-data early-digital-computers flexible-write-once-medium format holes mainframe-data-processing now-obsolete once-common paper paper-ephemera predefined-positions punch-card punched-card retro specialized stiff-paper storage-medium tabulating vintage