A portable workstation for use in a front passenger seat in an interior of a vehicle includes a body member having a plurality of walls that, together, form a box-shape configuration defining a closed bottom, an open top, and an interior area. The body member includes side walls having lower edges that are angled and increasingly offset from the bottom wall so as to be complementary to a bottom of the front passenger seat. A front wall extends downwardly from the bottom wall and in front of the front passenger seat, whereby to grip the front passenger seat. Walls extend upwardly to form compartments for receiving an article. The portable workstation includes a module attachment assembly having a plurality of upstanding side walls and a top surface defining multiple receiver slots. The workstation includes multiple accessory modules each having at least one boss removably received in a receiver slot.