Emulating on a web browser
Too lazy to download emulators, or stuck on someone else's PC? Try one of these emulators, they run off any modern PC internet browser.
Check this list for more browser-based emulators.
Internet Archive (MESS)
Bally Astrocade, Atari 7800, Entex Adventure Vision, Amstrad GX400 etc.
- MS-DOS Games : https://archive.org/details/softwarelibrary_msdos_games