Hi Im developing a vending machine which have conneted to the bank server for card related transaction..... I have completed the coding and the system is working fine..... But I am required to apply concurrency to the system in fact controlled ones...... Is there anybody who has an idea where the concurrency should be applied for such a system...... I dont need the source code but can u help me where it should come pleassssssssssssss............... Urgent

Oh dear, it really is one of those days.

When using a vending machine you insert your currency into slots in the machine. Then you select the desired item using buttons on the machine. In return you will recieve the desired item and change if you overpaid for the item. :)

In case you can't tell I have no idea what your actual question is. ;)
Just thought I'd go off on a little tangent to portray my cynicism towards those who ask strange questions on this site.