Given are some statements in respect of Computerized Accounting System (CAS). Which of these statement (s) is/are correct?
Statement 1: These are the four pillars on which Computerized Accounting System rests. 
Statement 2: Computerized Accounting System refers to the processing of accounting transaction through the use of hardware and software in order to produce accounting records and reports.
Statement 3: The accounting software is the input while the final output is in the form of accounting reports like Day ledger, Cash Book etc.

Only statement 2 is correct.

These are the five pillars on which Computerised Accounting System rests.
Computerised Accounting System refers to the processing of accounting transaction through the use of hardware and software in order to produce accounting records and reports.
CAS takes accounting transactions as inputs that are processed through Accounting Software to generate the following reports like • Day books/Journals • Ledger • Trial Balance • Position Statement (Balance Sheet) • Statement of Profit and Loss (Profit and Loss Account).