--- /dev/null
+* Task list
+** Rename SHT1 Title "VESSELS, TANKS, COLUMNS"
+** Mark "GROUP 1", "GROUP 2" in SHT1
+
+* Refrence
+** Drawing Grouping
+| Grp | Count | Category Desc. | DWG. ID. |
+|-----+-------+-------------------------------------------------------+-----------------------|
+| 1 | 29 | Vessels and Tanks | BK-2020-04-PID-1-SHT1 |
+| 2 | 8 | Columns with Internals | BK-2020-04-PID-1-SHT1 |
+| 3 | 16 | Heat Exchangers | BK-2020-04-PID-1-SHT2 |
+| 4 | 8 | Steam Generators, Furnaces, Recooling Device | BK-2020-04-PID-1-SHT2 |
+| 5 | 9 | Cooling Tower | BK-2020-04-PID-1-SHT2 |
+| 6 | 15 | Filters, Liquid Filters, Gas Filters | BK-2020-04-PID-1-SHT3 |
+| 7 | 7 | Screening Devices, Sieves and Rakes | BK-2020-04-PID-1-SHT3 |
+| 8 | 13 | Separators | BK-2020-04-PID-1-SHT4 |
+| 9 | 8 | Centrifuges | BK-2020-04-PID-1-SHT4 |
+| 10 | 8 | Drier | BK-2020-04-PID-1-SHT4 |
+| 11 | 12 | Crushing/Grinding Machines | BK-2020-04-PID-1-SHT5 |
+| 12 | 4 | Mixers/Kneaders | BK-2020-04-PID-1-SHT5 |
+| 13 | 4 | Shaping Machines — Processing in Vertical Direction | BK-2020-04-PID-1-SHT5 |
+| 14 | 3 | Shaping Machines — Processing in Horizontal Direction | BK-2020-04-PID-1-SHT5 |
+| 15 | 8 | Liquid Pumps | BK-2020-04-PID-1-SHT5 |
+| 16 | 10 | Compressors, Vacuum Pumps | BK-2020-04-PID-1-SHT6 |
+| 17 | 1 | Blowers, Fans | BK-2020-04-PID-1-SHT6 |
+| 18 | 22 | Lifting, Conveying and Transport Equipment | BK-2020-04-PID-1-SHT6 |
+| 19 | 5 | Proportioners, Feeders and Distribution Facilities | BK-2020-04-PID-1-SHT6 |
+| 20 | 8 | Engines | |
+| 21 | 14 | Valve | |
+| 22 | 4 | Check Valve | |
+| 23 | 9 | Valves and Fittings with Safety Function | |
+| 24 | 24 | Fittings | |
+| 25 | 9 | Graphical Symbols for Piping | |
+| 26 | 6 | Apparatus Elements | |
+| 27 | 8 | Internals | |
+| 28 | 10 | Agitators, Stirrers | |
+| 29 | 14 | Internal Characteristics and Built-In Components | |