Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Vikki Velasquez is a researcher and writer who has ...

The input-output system of a computer consists of the programs and devices that allow the machine and its user to communicate. Recently graphical devices for this purpose have evolved rapidly ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Yarilet Perez is an experienced multimedia journalist and fact-checker with a Master of ...