Each port implements a bidirectional synchronous serial channel. It is based on the difference between unidirectional and bidirectional synchronization of neural networks. Both unidirectional and bidirectional use were envisioned. Universals may also be bidirectional or unidirectional. There are two kinds of dimensions, spatial (bidirectional) and temporal (unidirectional). Windcatchers come in various designs&colon; unidirectional, bidirectional, and multidirectional. Early carburetor-based systems used a programmable throttle stop using a bidirectional DC motor. Replication follows the dsDNA bidirectional replication model. SystemC supports single-direction and bidirectional ports. Usage is prescribed in the Unicode Bidi (bidirectional) Algorithm. So doing enables Derecho to sustain the full bidirectional RDMA data rate. A* can also be adapted to a bidirectional search algorithm. This process is known as bidirectional replication. Port A can be used for "bidirectional handshake" data transfer. The companion cells also allow for bidirectional flow.