<P> The terms laptop and notebook are used interchangeably to describe a portable computer in English , although in some parts of the world one or the other may be preferred . There is some question as to the original etymology and specificity of either term -- the term laptop appears to have been coined in the early 1980s to describe a mobile computer which could be used on one 's lap , and to distinguish these devices from earlier , much heavier , portable computers ( informally called `` luggables '' ) . The term `` notebook '' appears to have gained currency somewhat later as manufacturers started producing even smaller portable devices , further reducing their weight and size and incorporating a display roughly the size of A4 paper ; these were marketed as notebooks to distinguish them from bulkier laptops . Regardless of the etymology , by the late 1990s , the terms were interchangeable . </P>
<P> The terms laptop and notebook are used interchangeably to describe a portable computer in English , although in some parts of the world one or the other may be preferred . There is some question as to the original etymology and specificity of either term -- the term laptop appears to have been coined in the early 1980s to describe a mobile computer which could be used on one 's lap , and to distinguish these devices from earlier , much heavier , portable computers ( informally called `` luggables '' ) . The term `` notebook '' appears to have gained currency somewhat later as manufacturers started producing even smaller portable devices , further reducing their weight and size and incorporating a display roughly the size of A4 paper ; these were marketed as notebooks to distinguish them from bulkier laptops . Regardless of the etymology , by the late 1990s , the terms were interchangeable . </P>
who introduced world first laptop computer in market
who introduced world first laptop computer in market
late 1990s
late 1990s