A(n) converts your voice's sound waves into digital signals.

When is an original work considered public domain? a. when posted via social media b. when it is posted on the internet c. when a copyright symbol is not included with the piece of work d. when explicit permission is given by the author / owner

These factors limit the ability to attach files to e-mail messages. location of sender recipient's ability to open file size of file type of operating system used

What is one reason why indoor air pollution has become an increasing problem.