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
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Classify the following based on the category of signals they use.
radio waves, television waves, sound waves, Computers, Digital Phones, Digital pens
### Input: 
### Response: Analog signal- radio waves, television waves, sound waves
Digital signal- Computers, Digital Phones, Digital pens