Some tech errors:
* A hard drive and a hard disk are much the same thing; but when it comes to removable computer media, the drive is the machinery that turns and reads the disk. Be sure not to ask for a drive when all you need is a disk.
* On the World Wide Web, a "home page" is normally the first page a person entering a site encounters, often functioning as a sort of table of contents for the other pages. People sometimes create special pages within their sites introducing a particular topic, and these are also informally called "home pages" (as in "The Emily Dickinson Home Page"); but it is a sure sign of a Web novice to refer to all Web pages as home pages. Spelling "homepage" as a single word is common on the Web, but distinctly more casual than "home page."
* In electronics, a jack is a female part into which one inserts a plug, the male part. People get confused because "Jack" is a male name. The cyberpunk term (from William Gibson's Neuromancer) "jack in" should logically be "plug in," but we're stuck with this form in the science fiction realm.