With the dust not yet settled from Microsoft Corp.'s bold move on the smart card market, Sun Microsystems Inc. has issued some not-so-subtle reminders that it is no johnny-come-lately.

Sun, a Microsoft competitor and antagonist in numerous contexts, has had smart cards in its sights for years. They fall within the range of computing devices-sometimes characterized as "thin clients"-that fit the network computing construct that the Silicon Valley company champions.

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