Various embodiments of the present invention are directed to methods and systems for data transfer between electronic, hand-held devices, including cell phones, and computer systems, including servers and PCs, as well as component methods and systems of these data-transfer methods and systems. The use of this instrument permits the unattended computer control, measurement and inspection of specimens mounted to the slides. In a first control state all LEDs are connected in parallel. Additionally, one or more IM addresses of the contact are also correlated to the reference ID, thereby permitting further correlation of a contacts IM information with the contacts email information. This LDAP control prevents the exposure of the replication directory server details to the outer world and therefore proves helpful in easing the security concerns.