  To create privacy-friendly software designs, architects need comprehensive
knowledge of existing privacy-enhancing technologies (PETs) and their
properties. Existing works that systemize PETs, however, are outdated or focus
on comparison criteria rather than providing guidance for their practical
selection. In this short paper we present an enhanced classification of PETs
that is more application-oriented than previous proposals. It integrates
existing criteria like the privacy protection goal, and also considers
practical criteria like the functional context, a technology's maturity, and
its impact on various non-functional requirements. We expect that our
classification simplifies the selection of PETs for experts and non-experts.
