325506
These systems formed part of the first generation of systems based on the 64-bit Alpha AXP architecture and at the time of introduction , ran Digital 's OpenVMS AXP operating system , with DEC OSF/1 AXP available in March 1993 .
 Digital
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Digital