A server for processing voice-enabled transactions from a communication device including a communications interface in communication with the communications device for receiving a voice transaction message generated at the communications device, the voice transaction message being in one of a plurality of predetermined formats for carrying out a transaction. The methods advantageously utilize a gas-liquid contacting apparatus having contacting stages with co-current flow channels that can provide contacting with increased liquid phase resistance to mass transfer, for example in the spray regime such that the liquid is effectively dispersed as small droplets into the gas phase. Furthermore, the invention relates to a method, wherein manufacturing data which have been created with a system for calculating manufacturing data are optionally forwarded to one or another manufacturing machine at different locations. A scheduling module determines, based on the virtualized infrastructure information, scheduling instructions for an activity module. Persons enter the exclusion zone wearing personal protective equipment, exit the exclusion zone and enter the contamination reduction zone, and de-contaminate their personal protective equipment in the contamination reduction zone utilizing a bleach solution. An organic EL device using the amine compound exhibits excellent luminance of emitted light and a long life.