Various HP Collections
updated Dec. 13, 2014

This page has links to various collections or personal museums of HP equipment.  I keep finding more so the list is growing!

Test Equipment
Ken's HP Museum

(Don't click this link. You are on a sub-page of this right now.)

This is my personal HP museum. I specialize in HP test equipment from 1939 to the 1970s.
The Vintage Hewlett-Packard Archive
This site is operated by my good friend, Glenn Robb, who is an Electro Magnetic Compatibility engineer and runs an RF test lab,  Research Triangle Compliance-Engineering located in North Carolina.  This is the place to go for free PDF downloads of HP catalogs from 1943 to 1980, HP Journals, Instrument Manuals, and more.  New material is always being added so check back often.
The HP Memory Project
The site was developed by my good friend, Marc Mislanghe, who worked for HP France.  He has a huge collection of HP equipment and publications -- maybe even larger than mine.  This site is the best by far of all the web sites related to HP history.  There are many pictures and stories tracing the evolution of HP instruments over the years. You can easily spend over an hour at this site exploring all the details.  Sadly, Marc died unexpectedly in July, 2014 and I volunteered to maintain the site for as far as one can see into the future as a tribute at its new URL.
The Museum of T&M Instruments
This site is operated by Stephan Graef in Germany. It has an English version (click on the British flag on the main screen) and is very worthwhile visiting. Stephan collects and restores vintage HP, Tektronix, and other test equipment. Stefan has done a great job as you can see by all the pictures.
The Virtual Oszimuseum
This is an oscilloscope museum in Germany and has numerous pictures of a wide variety of oscilloscopes including Hewlett Packard. There is an English version of the site -- click on the eng link on the main page.
The Museum of HP Calculators
This is the site to visit if you like old HP calculators as I do. My HP25 calculator I bought in 1975 still works and is used in my shop. My HP25 was the calculator I used while studying electrical engineering at Auburn University. The HP41C calculator I bought in 1979 still works too. I also have an HP32S-II calculator I use in my home office. I inherited my father's HP80 financial calculator and all of its accessories in mint condition. Via eBay I acquired an HP35 and HP45 calculator. Both are in excellent condition and work fine. The HP35 was made in 1972 - the first year it was sold. It is interesting to operate this bit of computing history. As primitive as these calculators are by today's standards they were the very best available then and I remember well wanting to have one but at that time the price was out of my reach.
The Calculator Reference
This site has information on a variety of old calculators and has a large section devoted to HP calculators.
Old Calculator Museum
This is an excellent site devoted to the history of calculating equipment in general.  There is information on HP calculators and there are numerous links to other calculator and related sites.
Story of the HP9825
This site has a detailed story of the history of the HP9825 desktop computer and also has a lot of general HP history as well.
Jacques-Laporte's Home on the Web
This is an excellent site pertaining to the HP35 calculator.  It contains details of the algorithms and a lot of other information all in one convenient place.  Information on other HP calculators is coming.
HP Computer Museum
This excellent site in Australia is devoted to the history of HP computers. There are many pictures and descriptions of these computing classics.  One of the many features of the site is a set of fun quizzes to test your knowledge of HP computers.  The tests range from easy (most everybody should score a 100) to challenging (I have to admit that test stumped me).  The site also has links to other interesting sites concerning the history of HP.
Museum of HP Clocks
This is a very interesting web site concerning accurate clocks.  This sub page on the site shows the owner's collection of every clock HP made.  The top page of the site is   which has considerable information about time measurement.  Although this is not HP, it is very interesting.  I highly recommend it.
HP Power Switches
This is an interesting sub page on a web site and shows the many variations of power switches on HP test equipment over the years.  It is very interesting.  I am familiar with these switches on my own HP gear but it never occurred to me to focus on that aspect.

Links to other web pages on this site This link takes you to the main HP Museum page. This link takes you to the main page of my personal web site where you can access a variety of information