Similar Vectors Blank White Keyboard 34 3 19 PLC 32 Digital Input 19 2 10 Tango Desktop Peripherals 23 2 12 Checkbox - checked 38 4 21 PLC 16 Digital Input 17 2 9 Computer Scanner Electronics Input Device 41 4 23 PLC 16 Digital Output 7 2 3 Keyboard clip art 41 3 23 Sound Amplifier 2 1 0 Radio button ON 7 2 3 Computer Mouse 26 3 14 PLC 32 Digital Output 9 2 4