Definiteness. E.g. step 5 depends on determining whether the subject of a chapter is “interesting”.
Output. The procedure produces no output.
Finiteness. After finishing the book, the procedure instructs returning to chapter 1.
Formatting: the procedure does not include a bracketed name, or a description of its purpose. It is not given a capital letter for a name, and as such its steps are numbered 1, 2, 3 rather than X1, X2, X3. There is no black rectangle to signal the end of the procedure.