This document discusses technical communication and interpersonal barriers to communication. It defines technical communication as a method of researching and creating information about technical processes or products directed to an audience through media. It also defines interpersonal communication as usually involving dependent participants with a shared history who can communicate one-on-one or in groups. The document then discusses various barriers to communication including physical, mechanical, mental, racism/cross-cultural, and gender barriers. It also provides definitions and examples of homophones, homonyms, and eponyms.