ISBN:

• 9781403496492
• 1403496498

Description: 32 pages : illustrations (some color), color map ; 23 cm.

Notes: Includes bibliographical references (page 30) and index.

LCCN: 2006039534

Control Number: 158643

Series:

• Inventions that changed the world
• Raum, Elizabeth. Inventions that changed the world.

Subjects:

• Computers -- History -- Juvenile literature.
• Computers -- Juvenile literature.