Related Clues:

• Some early personal computers
• Selectric typewriters, e.g
• Some early computers
• '80s PCs
• Big Blue computers
• Some mainframe computers
• System/360s, e.g
• Many mainframes
• Models for old clones
• Watson and others
• ThinkPads, e.g., once
• Old PCs
• 'Big Blue' machines
• Early ThinkPads, e.g
• PCs introduced in 1981