NextKSubset[l, s] gives the k-subset of list l, following the k-subset s in lexicographic order.
NthSubset[n, l] gives the n\[Null]^th subset of list l in canonical order.
PermutationGroupQ[l] yields True if the list of permutations l forms a permutation group.
RankGraph[g, l] partitions the vertices into classes based on the shortest geodesic distance to a member of list l.
UnrankKSubset[m, k, l] gives the m\[Null]^th k-subset of set l, listed in lexicographic order.
VertexCoverQ[g, c] yields True if the vertices in list c define a vertex cover of graph g.
SystemInformation gives detailed information about your Mathematica system. "Packages & Files" under the Kernel tab gives information about the packages currently loaded into ...
CellTags is an option for Cell that gives a list of tags to associate with a cell.
DeleteFile["file"] deletes a file. DeleteFile[{"file_1", "file_2", ...}] deletes a list of files.
SQLServerInformation[server] returns a list of information about the SQL server.