: A free, open-source alternative that many Reddit users prefer for its simplicity.

: Another free extraction utility that supports various archive formats. How to open it Guide to opening rar files - Avira

The file appears to be a compressed archive. Based on its name, "abecadło" is the Polish word for "alphabet," and it is likely a collection of files—such as documents, images, or software—related to learning or displaying the alphabet.

To access the contents of this file, you must them using specific software:

: The official program for creating and opening RAR files .