Abstract: Each electronically operated customer installable/replaceable unit module of a computer system is separately packaged to totally enclose the electronic/mechanical parts of each module within a box-like container or wrapper, the structure designed to maximize air flow through the system. This includes an electronics base module containing the basic logic circuits for the system, a power module containing all of the systems power supply circuits, and a pair of storage modules each containing the electronics and mechanical parts of a diskette device. The modules are loosely inserted into comparably shaped opened compartments of an enclosure base and bezel assembly constructed for toolless installation and removal of modules. An enclosure top cover which fits into the bezel contains finger-like protrusions in addition to embossing. When latched to the base and bezel assembly, the top cover correctly positions and holds the modules in place.

Abstract: A folding stairway interconnected with a basement window and its lock, for unlocking the window and opening the window when the stairs are pivoted from a closed or folded position to a down, usable position.