Hello, for make incremental counter in Zope I use ThreadSafeCounter. But I found that product a longtime ago (Zope 2.4.1). I would like to know if now it exists a Zope builtin that it can make incremental count and be Thread Safe. Is there ? If not, Why don't incorporate a ThreadSafeCounter like in Zope ?? I think a incremental counter is different than a unique id. - unique id like : eZ4J8RE8ZFzKop - incremental counter : 12345678 you can see that counter is more Human reusable, like accounting, facturing. Another exemple : using counter for naming uploaded files, done that in monthly log it' easyer to find them. blablabla ... ;o) cheers, Cyrille