Friday afternoon curiosity, Memory Available, Total Warnings, Total Errors are fairly obvious as to what they mean but how about the others ?

Code:
- Summary
- Memory Available: 2147483647
- Total Warnings : 57
- Total Errors   : 0
- Total Symbols  : 344589
- Total Resources: 0
- Total Commands : 893670
- Total Windows  : 35
- Total Pages    : 2
- Static Data    : 7383855
- Message area   : 7701844
- Total Blocks   : 312553
Total lines would be an interesting number ?