An original coded stream reproduced from a magnetic tape is decoded by an MPEG decoder, and original video data of a base band is thus generated. The mobile robot is capable of autonomously navigating through urban terrain, generating a map based on data from the range finder and transmitting the map to the operator, as part of several reconnaissance operations selectable by the operator. The selecting of storage devices includes distributing the portions of data based upon diversity of geographic locations of storage devices and diversity of storage device characteristics. This technique of reusing a photoresist mask can be employed for creating lightly doped source and drain regions of one conductivity followed by using the technique a second time to create lightly doped source and drain regions of the complementary conductivity type.