Those of us who officially retired from Digital Equipment Corporation, through the formal retirement process or the SERP (Early Retirement Program offered in the early 1990s), or from Compaq's similar programs post-DEC acquisition, are considered retirees of Hewlett-Packard Corporation.
HP offers benefits and programs for these retirees.   The main ones are pension, stock, and health insurance.

Program	Company	Contact
Pensions	HP Retirement Services Center at Fidelity  Prudential Pension Department	800-457-4015 877-778-2100
Stock Purchase	Morgan Stanley, Employee Stock Plan Service Center	866-722-7310
Health Insurance	Corporate Program or AON Exchange

There is an independent HP Alumni Association (HPAA) with an excellent website.  It's worth signing up 
for their mailing list and checking their Contacts page if you have a particular concern with benefits.  
HPAA has a special page for Digital Retirees:  DEC. HP/HPE Alumni (hpalumni.org)

HPAA advice on retiring from HP:  Know someone who is leaving HP? Please pass the word to anyone leaving HP to use the HP Alumni Association's "ASAP Checklist" immediately. It has advice and mutual help -- developed by HPAA members -- on the many things you have to do before you lose access to HP's internal systems. Thanks to Curt Gowan for this info. Go to http://www.hpalumni.org/asap (HPAA membership not required.)

HPAA advice on using HP Employee/Retiree purchase programs:  https://www.hpalumni.org/discounts

You might do better at Best Buy but if you want to check it out see their current advice.