Definition - What does Antique Software mean?
Antique software refers to any software that is no longer operational nor supported by its publisher. It is an obsolete software or application that was designed for computers, systems or devices that are no longer used.
Techopedia explains Antique Software
Antique software refers to any software that is not usable in current technology environments. In other words, it is obsolete. Although most operating systems and computer systems support backward compatibility, antique software might not be compatible with current software and hardware systems. Antique software is different from legacy software in that it is completely outdated and has been phased out, whereas legacy software is still in use but lacks the modern/current features of newer systems.