Why most of employers ask for experience of SAP or ERP when they need Assistant Accountant? As many of companies use different own accounting program?

Beacuse Most of companies these days use ERP syatem , even its differ from software to another , beacuse any ERP save time and effort Plus make the result more accurate , Also when the emplyer know that you have experience in any ERP system that lead to you have at least some experience of some accoutning information which will let him / her choose you instead of other will need to be tranied on ERP , Also you can be pack up for your friends any time if you the experience for any ERP or even assist him / her in work if they are a lot of tasks needed to be finished .

the experience of these is very important and any manager want to make sure that his employees have enough experience

Because global companies now tend to progress in the field of information technology has the financial system there fore tend to SAP