Final answer:
Off the shelf software has advantages like low cost, ease of use, and the ability to use it right away.
Step-by-step explanation:
An advantage of off the shelf software is often its low cost, as it is mass-produced and widely available. Additionally, off the shelf software is typically easy to use, which can be beneficial for individuals who may not have extensive technical knowledge or expertise. Lastly, one can use it right away since the software is already developed and ready to be installed. These advantages make off the shelf software a popular choice for many users.