As a rule, file names should be free of symbols or they could give you headaches when you try and share them. Symbols are characters like %, $, #. (Example of a problem file name: "Hannah's Essay#8" vs. "HannahEssay_8") .That's why some programs, like Microsoft Word, for example, restrict what characters you can use to name a document to text and numeric characters. Your teacher/school may have a required naming style for students to use. If not, It's generally best to keep document names text only. Just leave the symbols out. :-)