Two separate issues, the first is just documentation. 1/ Typical statement regarding /Sn: "If you specify a number after the /S, PDIR will limit the subdirectory recursion to that number. For example, if you have a directory tree "\a\b\c\d\e", /S2 will only affect the "a", "b", and "c" directories." In fact, the example shows that n+1 levels of subdirectories are reported. There is no "0th recursion". 2/ /S0 is interpreted as /S in both DIR and PDIR. For example, the command *dir/b/s0/a:d" in a test directory hierarchy reports: F:\TEST\a F:\TEST\b F:\TEST\c F:\TEST\h F:\TEST\c\d F:\TEST\c\f F:\TEST\c\d\e F:\TEST\c\f\g F:\TEST\h\i F:\TEST\h\i\j F:\TEST\h\i\j\k F:\TEST\h\i\j\k\l TREE /S0 reports only the top level subdirectories of its start point. I have not tested other commands, esp. COPY and its relatives, nor DEL and its relatives. Note: V9 processes /S0 consistently with /S1, /S2, etc.