Reading Metrics
Grade Level
Lower Grades (LG K-3)
Book Level
4.7
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
1277
Points per Word
0.000392
Page Count
32
Points per Page
0.015625
Description
From the first calculating machines made of cogs and wheels during the 1640s to virtual-reality headsets, this book charts the incredible history of computers.