ctlgs is a catalog of things people collect — books, gigposters, home video, hi-fi, instruments — and a place to record which of them you own, down to the copy.
The catalog is shared. Entries are written and corrected by anyone signed in, the way a reference database should be, and the discussion about how to catalog properly happens in the open on the forum. What you record about your own copies is yours, and private unless you say otherwise.
These pages explain what the site is for — start with how ctlgs works. The guides are the practical half.
Most collection sites log what you consumed. ctlgs records the objects on your shelf: this edition, this pressing, this copy, in this condition.
Catalogs, titles, objects and copies: the four ideas behind ctlgs, what is shared, what is private, and who can edit what.
Your old -ogs contributions, collection and wantlist can be attached to a new ctlgs account. Here is exactly what to post on the forum to get it done.
Anyone signed in can add an entry or fix one. No approval queue and no application: every save records who changed what, and why, in the history.
Nothing to pay on ctlgs: no subscription, no paid tier, no ads and no fee on a sale. Sign in with a forum account, and export your collection as CSV.
