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This is the VOA Special English Economics Report.
Competition often means waiting for people to make a choice.
That was the case with VCRs, video cassette recorders. During the 1980s, people had two choices: VHS and Betamax. The VHS format won the competition. Betamax disappeared from all but professional use.
More recently, the VHS, or video home system, format has been disappearing as people choose DVD players.
But now the two newest kinds of DVD players are in competition. Blu-ray and HD DVD are both designed for use with high definition televisions. These produce bigger, sharper pictures. They work best when showing movies or TV programs made in true high definition.
But high def takes up more memory, so a new kind of DVD, digital video or versatile disc, was needed.

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