Enterprise applications are designed to integrate computer systems across all phases of a business's operations. This allows for cooperation and coordination across the entire enterprise. Some key types of enterprise applications include customer relationship management systems, enterprise resource planning systems, project management software, and human capital management systems. Developing enterprise applications presents several challenges related to changing business needs, security, mobile platforms, big data, technology shifts, and maintenance over time. Adopting modular architectures, security testing, future-proofing, and interoperability frameworks can help address some of these challenges.