Futurist said:
What are their usage? Important for internet surfing ?
Shockwave, yes, if you want to view certain dynamic content. If you have a slow connection, and or little hardrive space, I'd only download the Shockwave player if you frequently play Shockwave browser games.
Flash (the latest version being MX [6.0]), on the other hand, is an animation software program used often by graphic artists and/or webdesigners. To view sites that have Flash-enhanced content, you'll need to install the Flash browser plugin (not the same as the animation software). There are lots of sites out there these days that are designed soley in Flash, and you'd be missing out on a lot of you didn't have the browser plugin. I think there is little or no download times. Just go to a Flash-enabled site and choose to install it. That simple.