He remembered me and we exchanged pleasantries. These goods were first exchanged by barter. Captives agreed not to fight until they were officially exchanged. In the simplest markets, goods were exchanged or bartered. Instead, they mostly exchanged text messages and emails. They were later exchanged for Lieutenant-General Yakovlev. Ideas could be exchanged quickly and passed down the generations. Ratifications were exchanged on 23 May following. In the process, addresses were exchanged. He merely exchanged his bike with his friend. Items may also be exchanged through trading or auctions. Files were first exchanged on removable media. Over any significant period of time, sediment is always being exchanged between them. The teams then exchanged punts four times each. Some irregulars may have even been exchanged between planets.