Q: Why do some users complete forms all in capital letters? This is because early teleprinters and computer systems had no provision for lower case.
What does it mean when someone uses all capital letters?
capital letters (= letters of the alphabet in the form and larger size that is used at the beginning of sentences and names), used especially in order to emphasize something or show that you are angry: Using all caps is considered yelling online.
Should you fill out forms in all caps?
If you're completing a paper application, it's wise to stick with the uppercase-lowercase format for reading ease.