Utilities classification: Which of the following programs is not considered a system utility (i.e., a support tool rather than an end-user application)?

Introduction / Context:
System utilities are support programs that aid in development, maintenance, and operation of a computer system. They differ from applications by serving system-level or developer-oriented tasks such as editing, debugging, printing, and resource management. This question asks you to identify which listed item is not a utility.

Given Data / Assumptions:

• Debugger: tool to examine and control program execution for defects.
• Editor: tool to create and modify text, code, and configuration files.
• Spooler: background service to queue and manage print jobs.

Concept / Approach:

All three listed items are standard examples of utilities or utility-like services. A debugger assists developers; an editor is a foundational utility used by admins and programmers; a spooler is a system service that queues output for devices (notably printers). Therefore, none of the options is a non-utility—the correct choice is “None of the above”.

Step-by-Step Solution:

Verification / Alternative check:

Operating systems ship with text editors (ed/vi/notepad), debuggers (gdb, windbg), and spoolers (print spooler service), all classified as utilities or system services in documentation.

Why Other Options Are Wrong:

• Debugger, Editor, Spooler (individually): Each one is indeed a utility.
• All of the above: Would claim none are utilities, which is false.

Common Pitfalls:

Confusing end-user applications with utilities; thinking “spooler” is purely hardware rather than an OS-managed service; assuming only command-line tools count as utilities.

Final Answer:

None of the above