dbacl 1.12-2.2 (s390x binary) in ubuntu bionic

 dbacl can distill text documents into categories, and then
 compare other text documents to the learned categories.
 .
 It can be used to recognize spam, and more generally
 sort incoming email into any number of categories such as
 work, play, and so on.
 .
 As a noise filter, it can be useful during the indexing of
 personal document collections.