A is a font format developed by Adobe Systems specifically for handling large character sets—most notably Chinese, Japanese, and Korean (CJK) . Unlike standard Western fonts (Type 1 or TrueType) which use a simple 256-character limit, a single CID font can contain tens of thousands of characters (glyphs).
, but rather temporary "aliases" created by software when it fails to properly embed fonts in a PDF Overview of CID Font Aliases When you see names like CIDFont+F1 CIDFont+F2 Cid Font F1 F2 F3 F4 Free Download
This file cannot be downloaded. Sorry, our virus scanner detected that this file isn't safe to download. OK. CIDFont+F1 issue - Adobe Community A is a font format developed by Adobe
: If you only need to view or print the file in Illustrator, you can import the PDF and use the Transparency Flattener to turn the text into outlines, which removes the need for the font entirely. Sorry, our virus scanner detected that this file
– In racing or sim communities (e.g., rFactor , Assetto Corsa ), "F1, F2, F3, F4" could refer to racing categories, and "Cid" might be a username or team name. Some modders package custom fonts with those labels.