The use of CD keys on the Upsilon 2000 was an early example of software activation and digital rights management (DRM). While the system had its limitations, it paved the way for modern software activation systems used today.
The use of CD keys on the Upsilon 2000 was an early example of software activation and digital rights management (DRM). While the system had its limitations, it paved the way for modern software activation systems used today.