Which of the following is not a feature of CAS?

The correct answer is Option (3) → Unreliable

The salient features of a Computerised Accounting System (CAS) are the qualities it is built to give: it is simple and integrated, transparent, accurate and fast, scalable, and reliable. "Unreliable" is the opposite of one of these features, so it is not a feature.

Option (1) Simple and Integrated — A feature of CAS. It automates and integrates sales, finance, purchase, inventory and manufacturing.

Option (2) Transparency and control — A feature of CAS. It gives greater transparency over day-to-day operations and better access to information.

Option (4) Scalability — A feature of CAS. It can handle more or less data as the business grows or shrinks.