We're still on the trail of the world's smallest office. The most recent entrant is the Pocket Hard disk (PHd), a hand-size, three-quarter-pound disk drive with as much as 205 megabytes (MB) of storage, which can be disconnected from one PC and attached to another.

Constructed to withstand a nonoperating shock of 150 Gs -- tough enough to take with you on a hard jog -- the diminutive device plugs into a PC's parallel port and draws power from the PC's keyboard socket, its own rechargeable battery pack, or an AC adapter. When the PHd is attached to an IBM-type PC (no Mac version is available), the PC's boot disk automatically recognizes the PHd as an auxiliary hard drive, so storage capacity of the base PC (desktop or portable) is effortlessly expanded.

Among other applications, the PHd could be used as a system backup, holding as much data as a foot-and-a-half-high stack of floppies; to archive existing data; or to transport a large program from one PC to another -- to send an extensive customer list, for example, from home office to a commercial mailer. Given that data-compression utility software can double the PHd's storage to about 410MB, a businessperson could indeed carry his or her entire enterprise in a pocket. That's no gimmick: what better security than to take everything with you when you leave?

The PHd is distributed by Synergy Resource (USA), 407-788-6708; it comes in 40MB, 60MB, 80MB, 120MB, and 205MB capacities. Manufacturer's suggested retail prices range from $380 (for 40MB) to $950 (for 205MB).

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