Remember the first Walkman? It 1 almost a quarter-century since Sony’s portable 2 players

　　changed the way people listen to music on the go. Now 3 form of entertainment is getting the

　　Walkman treatment. Palm-size 4 video players are beginning to change where and how people

　　watch movies, cartoons and music videos.

　　The gadgets(有用的小器械), which play 5 video files on a small screen, 6 generally less

　　expensive and more 7 than portable DVD players, which have been 8 for several years. None

　　of these new-generation players, in fact, play DVD’s. 9 , usingadvances in storage and

　　compression technology, most 10 video on hard drives or memory cards, much the way digital

　　audio players store music files.

　　“It’ just what happened to music,” said Ulrich Neumann, director of the Integrated Media

　　Systems Center at the University of Southern California. “We went 11 cassette tape to CD’s to

　　MP3 on memory chips or tiny hard 12 . What is happening now is that you have 13 movie files

　　going from DVD’s down to probably small micro drives.”

　　Yet it is unclear 14 the public will want to watch video on a screen the 15 of adoll house

　　window, with a resolution that is no match for even a standard TV set. After all,some hand-held

　　organizers can show video, but that 16 has never been a particularly strong selling 17 .

　　Watching a movie requires more 18 than listening to music, it is 19 difficult to see how the

　　mobile video players will be used in the on-the-go way that portable 20 players are.