Chapters 1-3 (z/OS fundamentals) 3. **z/OS Parallel Sysplex Overview** (SA22-7661) — Complete document 4. **DB2 13 for z/OS: Data Sharing** (SC28-4189) — Chapter 1 ("Introduction") 5. **CICS Concepts and Planning** — Chapters on task management and DB2 attachment 6. **z/OS MVS Planning: Workload Man