Check the listing for details. Berkeley Systems After Dark Screen Saver DOS 3.5" Floppy Disk Vintage PC. Condition: Acceptable, Made in United States. Listed at 8.49 USD. This is a vintage Berkeley Systems After Dark screen saver software, presented on a single 3.5-inch floppy disk. After Dark is a classic screen saver program, well-known for its iconic modules, designed for early personal computing environments. This particular version is specified for DOS operating systems, making it a piece of computing history for enthusiasts and collectors. The floppy disk itself is constructed from durable plastic with a metal shutter, characteristic of the 3.5-inch format. The label clearly identifies the software as "After Dark" and specifies "SCREEN SAVER" functionality for "DOS" systems, with "BERKELEY SYSTEMS" as the developer. This listing includes one 3.5-inch After Dark screen saver floppy disk, as pictured.