Which is the most essential Accounting Software that every accountant/finance professional should be well trained in?

SAP & Tally

These days definately SAP

There is a goroup of those and they are pretty similar to each other when it comes to accounting. The main ones are SAP, Oracle, & QuickBooks. Experience in any of them enables using the others.

Large Business - SAP, Oracle

Small/Medium size business - Quickbooks, Peachtree Sage50 and Tally.

SAP, Tally and Busywin

SAP, Oracle Financials and QuickBooks.

Its depend on Business which one can give good result for business normally in uae most popular software is

large business = SAP,ERP,  

small and midum size business = Tally,Peachtree,quickbook,busywin

but currently SAP is more Papular and demand in Market. 

It is depends upon Volume of Business ( Oracle and SAP )  for large businesses  ( Peachtree , Quick Books and Tally ) for moderate and small business .

This mostly depends on the nature of business activity, but proficient knowledge in MS - Excel and any small ERP is quite enough.

i think SAP then SMACC