Classify the following based on the category of signals they use.
radio waves, television waves, sound waves, Computers, Digital Phones, Digital pens
Analog signal- radio waves, television waves, sound waves
Digital signal- Computers, Digital Phones, Digital pens
Instruction: Classify the following based on the category of signals they use.
radio waves, television waves, sound waves, Computers, Digital Phones, Digital pens
Context: 
Response: Analog signal- radio waves, television waves, sound waves
Digital signal- Computers, Digital Phones, Digital pens