What do these abbreviations mean HW, SW, CW, GW...?

HW: 146 lbs
SW: 132 lbs
CW: 127.2
GW1: 125 lbs
GW2: 120 lbs
GW3: 115 lbs
UGW: 110 lbs

Disregard the weight but I don't know what HW..and all those mean. I'm guessing HW means healthy weight.
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