These are packages not part of the standard but that someone at the institution has used.
psfrag: LaTeX-text in PostScript-diagrams
The package psfrag enables automatic changes of strings in a PostScript-image for LaTeX-constructs.
elsart: Class for IFAC-documents
Note: Not a package but a class. The class {elsart} was used in a couple of scientific publications publiced by Elsevier. The file ascii.tab is mentioned in the documentation.
booktabs: Publication quality tables
The package booktabs enables tables of considerably better typographical quality than the default ones. There's also a good description of tables from a typographical viewpoint.