Someone has unearthed a video on YouTube 
of Steve Jobs demonstrating NeXTSTEP way back in 1992.
The video is long (35 minutes) but begins with Steve talking up how NeXTSTEP has “much, much better productivity apps” than other operating systems.
That includes NeXTMail, the precursor of Apple Mail, which Steve puts through its paces after demonstrating the revolutionary NeXTSTEP Dock:
After watching how far ahead of the pack NeXTMail was, you can read more about Mail in NeXTSTEP (Apple Mail: The Early Years) and about the origin of bundles, which live on in today’s Mail.app as plugins.
[Via Global Nerdy ]