(If it is a model number, part number, or serial code, it is best written in all-caps, as numbers are considered neutral and letters in codes are usually capitalized for clarity).
"Proper case" (or Title Case) typically capitalizes the first letter of each word and acts on text, not alphanumeric codes. 68539x
(If it represents a lowercase variable or specific technical notation). (If it is a model number, part number,
Based on standard capitalization rules, the "proper text" formatting for depends on its context, generally resulting in: (If it is a model number
If you can tell me what this code is for (a product part, a software variable, etc.), I can give you the exact formatting standard. Convert Text to Proper Case - Online Text Tools