Then, you need to be able to identify which journals are peer-reviewed. There are generally four methods for doing this: 1  Limiting a database search to peer-reviewed journals only. 2  Some databases allow you to limit searches for articles to peer reviewed journals only.
A walkie-talkie (more formally known as a handheld transceiver, or HT) is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald L. Hings, radio engineer Alfred J. Gross, and engineering teams at Motorola.
A SCR-300 walkie talkie. The first radio receiver/transmitter to be widely nicknamed Walkie-Talkie was the backpacked Motorola SCR-300, created by an engineering team in 1940 at the Galvin Manufacturing Company (fore-runner of Motorola).