Final answer:
The term used to list all commands in computer science depends on the system being used, and none of the provided options are universal across all systems. In Unix-like systems, 'man -k .' or 'compgen -c' in Bash can be used to list commands.
Step-by-step explanation:
In computer science, the term used to list all commands is often dependent on the context and the specific software or shell being used. However, none of the options provided (searchcommands, disapplycommands, listcommands, showcommands) universally represent a macro used to list all commands across different systems. Typically, in Unix-like operating systems, you can use man -k . to search for commands available on the system, or compgen -c in the Bash shell to list all commands you could run. In other environments or with specific software, other commands or functions might be used to achieve this.
It's important to note that there is no standard macro across all computer systems or software that performs the function described. Instead, similar functionality can generally be accessed through various means depending on the system in question. For general knowledge, there is not an option that universally applies as the correct answer to the question as phrased.