Abstract: Each work unit includes a main table, for supporting a typewriter or a bookkeeping machine, and a side table extending laterally from the main table. Each table has a frame, and the frames of the two tables of each unit are disengageably interconnected. The main table has a pair of longer sides and a pair of shorter sides, and the associated side table is disengageably connected to one shorter side of the associated main table, with the main tables extending alternately to the right and to the left from the chain of work units. The side tables have their shorter edges interconnected with each other to form the work unit chain. The table tops may be adjustably mounted on their supporting frames so as to be adjustable in height or tiltable, and auxiliary shelves may be provided beneath the side tables. Additionally, each side table may support a box-shaped attachment to form a storage recess or the like.