If you're new to Job Corps you'll have a six week training period in which you will be "taught" how to use a computer.
Creating documents, doing online searches, etc. Which will only be helpful to you if you're from the cast of Deliverance or you are in fact a Hill Billy from the Beverly area and have never heard of a computer, or the Internet.
But after that "training" period you will be allowed access to a computer. Some sites let you have your own laptop and some dorm rooms have a dorm computer. And depending on what trade you are currently taking you may have access to the Internet all day.