An input jack is a port found on electronic devices that's used to input audio signals to them. Another term for input jack is "audio connector," and most often, it can be used interchangeably with the ubiquitous term headphone jack. Other synonyms for input jack include "line-in," "mic-in," "auxiliary," and "audio input." Typically located on computers, stereos, and amplifiers, input jacks are essential ports that people use for connecting external audio sources. It provides a direct audio signal path from an external device, ensuring high-quality sound output. These synonyms provide flexibility in communication and can be used to describe the same function of providing a means for an audio device to receive audio input.