  This proceeding covers tools and technologies at our disposal for scientific
data preservation and shows that this extends the scientific reach of our
experiments. It is cost-efficient to warehouse data from completed experiments
on the tape archives of our national and international laboratories. These
subject-specific data stores also offer the technologies to capture and archive
knowledge about experiments in the form of technical notes, electronic logs,
websites, etc. Furthermore, it is possible to archive our source code and
computing environments. The paper illustrates these challenges with experience
from preserving the LEP data for the long term.
