Key: Legal successor and corporate names. 

- HPInc is the legal successor to the companies acquired by the Hewlett-Packard Company before the company was split into HPInc and Hewlett Packard Enterprise (HPE.) Responsibility for any commitments to former employees of Autonomy, Compaq, Digital, EDS, Tandem, etc. remain with HPInc -- regardless of whether the employee's last business unit ended up in HPInc or HPE. This includes employment verification and any retiree health coverage, pension, 401(k), etc. plans. HPE is responsible for any commitments to former employees of companies acquired by HPE, such as Cray, Nimble, etc. (About the HP Breakup)

- When EDS was sold to HP on Aug 26, 2008, it was temporarily structured as a wholly-owned subsidiary called "EDS, an HP Company." On Sep 23, 2009, it was renamed "HP Enterprise Services."

- On Oct 21, 2015, Hewlett-Packard Company spun off Hewlett Packard Enterprise (no hyphen; singular.)

Make sure that every company you ever worked for has your current postal address. Even if not classified by the company as a "Retiree" or if long gone -- in case of class-action settlements or other issues. Update address at former company

Which HP-related companies am I a retiree or former employee of? (Not always obvious.) Given HP's complex history of acquisitions, divestitures, and spinoffs, the company or companies that you are legally a former employee of may not be obvious. If any doubt, check here: Which Company

You may have an EDS pension. If you were employed by EDS or "EDS, an HP Company" before January 1, 2009 you may have an EDS pension that you have forgotten about. https://www.hpalumni.org/edsPension

If you received a "Potential Private Retirement Benefit Information" notice from Social Security, it is based on years-old information, as indicated by the "Year Reported" box. The key word is "potential." Here's how to decode it -- and who to contact if you are not sure what happened with that account.

EDS 401(k):

- The HPInc Retirement Service Center manages pension and 401(k) accounts for HPInc (formerly named Hewlett-Packard Company.) Also manages any pension or 401(k) accounts that Hewlett-Packard predecessor companies (such as Compaq, Digital, and EDS) may have had. Operated by Fidelity Investments.
1-800-457-4015, M-F 7:30 AM to 11:00 PM Central Time. Outside the U.S., call 1-508-787-9902 collect. Website: https://nb.fidelity.com/public/nb/hp/home

- Members indicate that the EDS 401(k) was administered by Vanguard before EDS was sold to HP.

Stock issues for former EDS employees. https://www.hpalumni.org/StockEDS

Service at predecessor companies. Of HP's many predecessor companies, only HP and DEC had retiree healthcare programs. Only HP, Digital, and EDS had pension plans. Over the years, HP, DEC, and EDS set aside money in dedicated trust funds to pay for those programs. Compaq, Tandem, Autonomy, Palm, etc. did not have retiree healthcare or pensions among their benefits programs. Their employees did not have those expectations and there were no corresponding trust funds to pass on to an acquiring company. Therefore, employees of those companies do not get credit under HP's retiree healthcare or pension programs for service at the predecessor company. (Predecessor service does count for FTO.) 

Report disability or a death to the company: https://www.hpalumni.org/report

Vehicle discounts. GM owned EDS from 1984 to 1996. Current eligibility and sponsorship rules for GM retirees, former GM employees, widows and widowers of former GM employees, and GM Family Legacy Program: https://www.gmfamilyfirst.com/about-the-discount/

The Hewlett-Packard Alumni Association is operated by former employees who volunteer their time. Not officially endorsed or supported by any company. More about the HPAA