Machines & inventions. 

 - Alexandria, Va. :  Time-Life,  [c1993] 
 - 151 p. :  col. ill. ;  31 cm. 
 - Understanding science & nature .
 - Understanding science & nature. .
<br/><br/> Includes index. 
<br/><br/>Inventions that changed history -- The machines of industry and science -- An explosion in office equipment -- Machines for leisure time -- Machines for the home -- Medical marvels. 
<br/><br/> Presents the history of technological development and describes inventions that changed history, such as the printing press, gunpowder, and the steam engine, using a question and answer format. 
<br/><br/><label>ISBN: </label>0809497042 (trade) 9780809497041 (trade) 0809497050 (lib. bdg.) 9780809497058 (lib. bdg.) 
<br/><br/><label>LCCN: </label>92035710  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machinery--Juvenile literature.<br/>Inventions--Juvenile literature.<br/>Discoveries in science--Juvenile literature.<br/>20150400.<br/>Inventos.<br/>Artes técnico-industriales--Historia.<br/>Tecnología--Historia.
<br/><br/><label>LC Class. No.: </label>TJ 147  / M149 1993 
<br/><br/><label>Dewey Class. No.: </label>621.8