The scope of PHI can be broad; however, medical information that an employer receives in its role as an employer (and not as the sponsor or administrator of a group health plan), is generally not PHI subject to HIPAA.
Alphabetic characters are the 26 letters of the alphabet. Numeric's are the ten digits. Alphanumerics are both. Some of the special characters on a standard keyboard do not work for usernames or passwords.
Basic numeric formats have two common components. The width of the output and the number of decimal places. The SAS system uses floating-point representation referred to us as W.D, where W is the width and D is the number. of digits to the right of the decimal place.