Direct mail is a broad term that includes the following types of mailed promotions: Institutional direct mail serves to promote the name of the publishing house with no reasonable expectation of sales revenues.
touch (Unix) touch is a standard Unix command-line interface program which is used to update the access date and / or modification date of a file or directory. In its default usage, it is the equivalent of creating or opening a file and saving it without any change to the file contents.
Command Prompt is one of the command-line interface programs used to execute commands in Windows operating systems. Some popular Command Prompt commands you might have heard of include ping, netstat, tracert, shutdown, and attrib, but there are many more. We have a complete list here.