Here's why:
* Concrete nouns refer to things that are tangible, meaning they can be touched or perceived by the senses. A spreadsheet, although a digital construct, is a physical representation of data that can be viewed, interacted with, and even printed.
* Abstract nouns refer to ideas, concepts, qualities, or states of being that cannot be touched. Examples include love, happiness, or justice.
While the information contained within a spreadsheet might be abstract, the spreadsheet itself is a physical object, making it a concrete noun.