| Security | Data Management | Execution Management | Information Services | Common Runtime |
| Authentication Authorization | Data Replication | Community Scheduler Framework | Index | C WS Core |
| Community Authorization | Reliable File Transfer (RFT) | Grid Resource Allocation and Management | Trigger | Java WS Core |
| Delegation | Data Access and Integration | Grid Telecontrol Protocol | Web Monitoring and Discovery System (Web MDS) | Python WS Core |
| Workspace Management | ||||
| THE COMPONENTS BELOW ARE NOT BASED ON WEB SERVICES: | ||||
| PreWS Authentication Authorization | GridFTP | PreWS Grid Resource Allocation and Management | PreWS Monitoring and Discovery (DEPRECATED: Will be dropped in a future release) | C Common Libraries |
| Credential Management | Replica Location | eXtensible IO (XIO) |
Table 1: Globus Toolkit 4 introduces a number of web-services (WS) components while continuing to support the original (nonWS) components. Bold indicates stable components that form the main Globus API, while preview components that are subject to change are shown in plain text.
