PDOs can be sent synchronously or asynchronously. This may be done synchronously or asynchronously. Vectored I/O can operate synchronously or asynchronously. This type of training can be delivered synchronously or asynchronously. Tasks can execute asynchronously (in the background) or synchronously (wait until ready). Depending on the technologies used, replication can be performed synchronously, asynchronously, semi-synchronously, or point-in-time. A PLL may be used to synchronously demodulate amplitude modulated (AM) signals. Light emitting diodes enable the consumer product to communicate synchronously with the mobile device. Task entries can have parameters similar to procedures, allowing tasks to synchronously exchange data. Memory is clocked synchronously with the VSA-100 chip. Flexowriters have electromechanical paper tape punches and readers which operate synchronously with the typewriter mechanism. All entities' states are updated in parallel or synchronously. Young gharials move forward by pushing the diagonally opposite legs synchronously. EEG shows periodic complexes with high-voltage diphasic waves occurring synchronously throughout the recording. However, not all cells in a culture replicate synchronously.