Computing science essentially involves the application of computer systems used to process, store, and manage information. Quantum computing is an emerging technology that seeks to use quantum mechanical phenomena such as superposition and quantum entanglement to perform computation more powerfully and more efficiently than current classical computers.

This branch of computing greatly expands the capabilities of how computation is undertaken. It promises to solve tremendous problems involving data without the limits currently imposed by classical computers. Unlike classical computing systems that operate at the speed of light, quantum systems are capable of operating multiple calculations simultaneously.

Cryptology remains the most promising area of practical application for quantum computing. While quantum computing poses the risk of breaking many encryption techniques used widely, existing ones such as RSA encryption can be effectively countered with quantum key distribution techniques that may enable stronger decrypting keys to be used.

Generally, Quantum Computing holds great promise for drug discovery. With advances in AI and computing, developing new drugs can be accelerated with the aid of algorithms capable of predicting the effectiveness of certain drugs to treat specified diseases. Coupled with high precision Quantum Computing, development of novel catalysts and materials to transform the shapes of the healthcare and energy industries as envisioned can be achieved.

Nonetheless, quantum computers remain delicate machines as qubits themselves are highly sensitive to their environment prompting issues such as decoherence and error. Even with these setbacks, developments in quantum computing remain very much active as researchers explore error correction techniques, robust qubit architectures and error correction methods based on self-correcting codes.