A data type is simply a type of data which has many definitions such as Boolean, Date, Number and Integer
Boolean - presents a checkbox to the user and stores a true of false
Date - a a preformed text field that displays a convenient data picker to assist in selecting the desired date
Number - a text box that only accepts numbers as inputs, but puts no constraints on the kind of number entered
File upload - to upload a document to attach to a data record that uploads are stored in Documents and media.
What is Sans Serif Text Fonts
San Serifs don't have details or flourishments on the letters
Serifs fonts are the same types of font only with decorative flourishments on the end of letter.