Related:

• Master trace is the system's answering machine. It collects your messages, discards the old ones, and you never get those annoying hang-up calls.
  -- MVS/ESA: Diagnosis: Tools and Service Aids LY28-1813-03 -- 8.0 Chapter 8. Master Trace...
• Like that one drawer in your kitchen ... full of all kinds of unrelated stuff that winds up being necessary when you least expect it.
  -- MVS/ESA: Diagnosis: Tools and Service Aids LY28-1813-03 -- 6.0 Chapter 6. The Dump Grab Bag...
• A programmer's best friend - the system trace. Just like your dog, system trace is always there, running, and it doesn't need special care or feeding.
  -- MVS/ESA: Diagnosis: Tools and Service Aids LY28-1813-03 -- 7.0 Chapter 7. System Trace...
• Component trace is like a Swiss Army Knife: a lot of little tools built into one.
  -- MVS/ESA: Diagnosis: Tools and Service Aids LY28-1813-03 -- 10.0 Chapter 10. Component Trace...
• Instruction address trace is the systems little black book, chock full of the addresses of all those important instructions -- MVS/ESA
  Diagnosis: Tools and Service Aids LY28-1813-03 -- 12.0 Chapter 12. Instruction Address Trace...
• Like a trip to the dentist. . . you only go when you have to, and you know it's gonna hurt.
  -- MVS/ESA: Diagnosis: Tools and Service Aids LY28-1813-03 -- 3.0 Chapter 3. Stand-Alone Dump...
• SVC dump is like a burglar alarm. . . . It lets you know something's wrong and helps you pinpoint where it started.
  -- MVS/ESA: Diagnosis: Tools and Service Aids LY28-1813-03 -- 2.0 Chapter 2. SVC Dump...
• A SNAP dump is like getting a snapshot of yourself while hitting a baseball.
  You can go back later and look at what you did wrong so that you can improve....
• You don't want to see system messages, you just want everything to work right.
  But since you have to use them, here's how. -- MVS/ESA...