A broken HP EliteBook hits the bench. You pop the bottom cover, pull the RAM, and stop. You have this exact module on the shelf already — pulled from a Lenovo you parted out in March. Same DDR3-1600, same voltage, same spec. Your catalog should know that. Most catalogs don’t — because the fitment you just verified isn’t the kind of cross-reference any database is built around.
The compatibility feeds you can subscribe to are built around late-model cars and current trucks — the work where the data companies see the volume. The rest of the parts world is on you. The cross-references that matter to your shelves are the ones you record on your own teardowns. PMP is where you put them down so they stop living only in your head.
Why you don't have a catalog yet
Most parts businesses don't have a parts catalog. Not because the knowledge isn't there — you've got years of it — but because the catalogs you can buy are built around someone else's work, not yours.
The data companies that sell compatibility feeds build them where the volume is: late-model cars, current trucks, the work where the math pays off for them. The rest doesn't get covered. A little, sometimes. Mostly nothing.
Industries those data companies don't bother with:
- Salvaged computer parts — laptops, towers, servers. The kind of cross-references that come from teardowns, not spec sheets.
- Appliance repair parts — washers, dryers, ranges, fridges. The cross-references for older models come from the technicians who service them.
- Vintage electronics — receivers, amps, tube radios, classic computing. The fitment lives with the people who restore them.
- Agricultural and industrial equipment — tractors, implements, small engines, pumps, motors, compressors.
- Marine, RC, musical instruments, restaurant equipment — same story.
If you work in any of these, you already know what this looks like. The cross-references that matter to your shelves aren't in any database. They're in your head, in your notebook, and in the parts of your spreadsheet only you can read.
Want to see how the catalog gets built from a single teardown? See the product overview — then start with one unit and record the parts as you go.
What your catalog knows that a database can't
That DDR3-1600 SODIMM you pulled from the EliteBook. You know — because you've torn down hundreds of machines — that the same module also fits the Lenovo ThinkPad T430 series, the Dell Latitude E6430 generation, a stack of OptiPlex 7010s with the right SODIMM slot, and a handful of mid-2010s small-form-factor desktops.
A licensed database can tell you "DDR3-1600 SODIMM, 1.5V, 204-pin." That's the spec sheet. It will not tell you the seven specific machines you've personally pulled this exact module out of and verified the fitment on.
That difference matters for three reasons:
- Your buyer is searching for their machine, not the spec. They search "RAM for ThinkPad T430." They do not search "DDR3-1600 1.5V 204-pin SODIMM."
- Your shelf has the part already pulled, labeled, and ready to ship. The catalog connects the buyer's search to the listing of what you already have.
- You've already confirmed the fit on the part itself. That's the part of the work specs alone can't do. The catalog turns that confirmation into a recorded relationship.
Same with appliances. The control board in a Whirlpool washer of a certain era also fits two Maytag models. Same with vintage audio. Same with industrial pumps. You know the fitment. The database doesn't. The catalog is where it gets written down.
Month one vs month twelve vs month twenty-four
Month one of building a catalog, you've torn down a handful of units. You have a few cross-references. The catalog is a curiosity.
Month twelve, you've torn down a couple hundred units. You have hundreds of cross-references — every one of them recorded by you, on a real teardown, from a real part. When a 2014 ThinkPad comes through the door now, you do not research compatibility. The catalog already knows. Pricing is faster. Picking is faster. Listing is faster.
Month twenty-four, the catalog has more cross-references than you can count. It knows your work, your shelves, your buyers. Walking away means starting over from zero.
A bin count is worth the same whether you've recorded one of them or a thousand. A cross-reference gets more valuable the more of them you have, because every new one connects to every old one.
Your knowledge, our documentation tool
PMP doesn't care whether you tear down EliteBooks, washing machines, Marantz receivers, or industrial pumps. It knows a part fits one or more units, because you told it which ones. The cross-references live with you because you're the one pulling parts. PMP is just the place to put them.
The knowledge is yours. You bring it. PMP is where you organize it and turn it into a reliable record — one that's searchable, tied to the teardown it came from, and connected to the parts sitting on your shelves.
That's why your catalog beats the bought ones for your work. Bought catalogs serve buyers who'll go anywhere. Yours serves the ones who came looking for you.
The bottom line
You already have a catalog. It lives in your head, in your notebook, and in the parts of your spreadsheet that only you can read. PMP is the place to write it down so it stops living in any of those.
The catalog you build is specific to your work, your shelves, and your buyers. Every cross-reference is accurate because you confirmed the fit on the part itself. It compounds on every teardown. And it’s exportable — full CSV, any time, in an open format. That goes for day one and day three thousand the same way.
That's the catalog you've had all along — finally written down where it pays you back.
Start with one unit.
One unit record, the parts you pull from it, the cross-references to anything similar already on your shelves. That's the starting move — and it pays back faster than you'd expect.