What IO connectors are supported in Apache Beam?

Apache Beam supports various types of IO connectors that can be used for reading and writing data. Some popular ones include:

1. FileIO: used to read and write files in local or remote file systems.
2. TextIO: For reading and writing text files, with support for performing line-by-line operations on text files.
3. AvroIO: Used for reading and writing files in Avro format.
4. BigQueryIO: Used for reading and writing data in Google BigQuery.
5. Pub/SubIO: Used to read messages from or write messages to Google Cloud Pub/Sub.
6. KafkaIO: used for reading messages from or writing messages to Apache Kafka.
7. JDBCIO: used for reading data from or writing data to relational databases.

These IO connectors enable Apache Beam to easily integrate with various different data stores and message queues.