Noncapital purchases: Choose an object code that describes how the item will be used. Example: If you are buying envelopes that will be used for mailing, code the purchase to 5230, Office Supplies; if you will be using the envelopes to store research samples, use 5490, Research Supplies. Capital purchases: Choose an object code that describes what the item is. Example: If you are purchasing a computer use object code 7620, Data Processing Equipment, regardless of whether the computer will be used for educational, research or support purposes.