Some people are discovering that the common buttons on calculators, such as C, CE, and AC, have different meanings that can be confusing. A TikTok user named Patrice Iglesias shared her realization about the meanings of these buttons while playing with a toy cash register. Others on Reddit have also explained the differences between the buttons, with C and AC standing for "clear entry" and "all clear," while CE and C stand for the same but with a slight variation. Despite the helpful information, some remain skeptical about using the buttons efficiently, preferring to start over if they make a mistake. Nonetheless, many are grateful for the clarification and have found it enlightening after years of confusion.