Related Clues:

• Trillion, in 12-Down unit names
• Phone add-on
• 'Big' prefix
• Prefix with bytes
• Both thin and thick stuff written by me — quite some name!
• The 'M' of MB
• Thousand: Prefix
• 2.2 pounds
• Metric trillion
• Prefix for byte meaning 'one billion'
• Prefix for byte meaning "one billion"
• Contraband measure
• Prefix with byte or gram
• Great match — second half on top
• ''Trillion'' prefix