Be aware that some browsers (like Safari) may incorrectly try to display the raw code of a .7z file as plain text, which will look like unreadable gibberish.
The file is a compressed archive that likely contains documents related to economics, as the Hungarian title translates to "Wonderland of Economic Subjects."
Only open this archive if you received it from a trusted source . Like any compressed folder, .7z files can potentially hide malicious software.