CORE allows you to enter both a description and a memo for your time and expense entries. But it is important to know how you can use these differently. Descriptions are used to briefly describe the activity (or expense) items and are pulled directly from the Activity Items (or Expense Items) screen. They are normally a generic phrase or explanation of the activity (or expense) item. On the other hand, memos allow you to give more details about the task or expense you are entering. Both descriptions and memos can be shown on invoices, depending on the invoice template you choose.