Related Clues:

• 'Killer' PC programs
• PC program, briefly
• PC programs, slangily
• PC suite components
• Computer operating system of old
• Early PC program
• PC programs, informally
• Web software, for short
• Early operating system developed for PCs
• Old PC standard
• Silicon Valley product
• Kindle download
• Windows ancestor
• Many PCs once ran on it
• Programmer's solution, briefly