Light gray Olivetti Praxis 48 instruction manual cover divided into four vertical panels, each featuring a large blue and black shadowed serif letter (A, B, C, D) above its lowercase counterpart, with "olivetti PRAXIS 48" in green and "gebruiksaanwijzing" in red.

Navy blue book cover of a Corporate Identity Manual with overlapping, rotated white geometric sans-serif letters spelling "CIBA-GEIGY" repeated at multiple angles and scales across the surface.