Your Colleague account number consists of 15 digits;11.10.123601.55720. The last five digits are referred to as objects. If the last five digits begin with a 5 it’s an expense object. Expense objects identify the type of expenditure associated with your purchase.
For example, Office supplies are designated 55720, Capital Outlay is designated 56520.
Click for a complete list of Expense Objects
If the last five digits start with a 4 it's a revenue object. Revenue and Expense objects are not universal. Each have their own unique number sequence.