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Apple Open Collaboration Environment, or AOCE (sometimes OCE), was a collection of messaging-related technologies introduced for the Mac OS in the early 1990s. It included the PowerTalk mail engine, which was the primary client-side interface to the system; the PowerShare mail server for workgroup installations; and a number of additional technologies such as Open Directory, encryption and digital signature support.AOCE/PowerTalk was heavily marketed between 1993 and 1995, but the hardware requirements meant that most users couldn't even install it, let alone use it.
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