I'm pretty sure the answer is a rogue Access point
Answer:
In computing, memory is a device or system that is used to store information for immediate use in a computer or related computer hardware and digital electronic devices. The term memory is often synonymous with the term primary storage or main memory. An archaic synonym for memory is store.
If wants to keep the chart but does not want it taking up space, he can move it to another sheet. Once he goes to the Move Chart tab, he should select New Sheet which will ask for a name of the new sheet. After doing this, the chart will be moved to a different sheet.