Microsoft BOB 1.00a
Released in 1995 by Microsoft
For Windows 3.1

Microsoft BOB is a graphical shell intended for novice users. It
presents your desktop as a series of "rooms" with various selectable
objects, and assists you with a friendly animated guide. This is a
16-bit Windows application for Windows 3.1 and later.

1.00a includes several new room styles and additional assistants.