Debian package information is generally stored in files having a special file format, dubbed the Debian control file format (dctrl), a special case of the record jar file format. These tools operate on any files conforming in a general sense to that format, and are therefore widely applicable whenever this format is in play. The tools in this bundle are grep-dctrl, sort-dctrl, join-dctrl, and tbl-dctrl.
The Internet Gopher Client is based on the UMN Gopher/Gopherd 2.3.1 code. Gopher is an Internet technology that predates the Web. It presents information as a virtual network-wide filesystem. Modern browsers such as Konqueror can display gopherspace as if it contained files on your local machine (trees, drag and drop, etc.), but the difference is that each file or folder in that tree may be on a different machine.