Example methods, apparatus, and articles of manufacture to collect metering information associated with media presented by portable and computer media presentation devices are disclosed. A disclosed example method accesses a first data structure including metering information generated by at least one of first media presentation software executed by a personal computer or second media presentation software executed by a portable media presentation device. The metering information is associated with media presented by at least one of the first or second media presentation software. At least some of the metering information is then extracted from the first data structure and stored in a second data structure. The at least some of the metering information is then communicated from the second data structure to a data collection facility.