From some searching, Windows 95 was about 15 million lines of code, and Windows 3.1 had about 3 million. Compared to Firefox: https://www.openhub.net/p/firefox

From some searching, Windows 95 was about 15 million lines of code, and Windows 3.1 had about 3 million. Compared to Firefox: https://www.openhub.net/p/firefox/analyses/latest/languages_summary https://www.openhub.net/p/firefox/analyses/latest/languages_...