I have what appears to be the working copy of a GLO plat that was used to keep track of the various land parcels that were being sold by the land office agent. Anyone familiar with the abbreviations to determine what they all mean? "H" is probably "Homestead", "F" is likely "Final", "TC" is probably "Timber Claim", "CASH" is probably payment made early. Here are some of the abbreviations found on the plat:
H D
H E
F H C
F F C
F H E
F L C
T C
CASH 
How on Earth did you glean all those from that image?
I could only pick out a couple from that busy piece of work.
Here is a list of terms identified. Not all of the ones you listed but a few of them. I previously searched for a definitive list and didn't find anything. Perhaps this thread might fill in the blanks for all.
Entry Terms
credit entry
ce=cash entry
he=homestead entry
te=timber entry
me=mineral entry
Here is a link to a list of abbreviations on the California BLM website (these are for the modern Master Title Plats but some of them may be the same):
TC=Timber Culture
HD might be Homestead Declaratory
I found the following on the National Archives site:
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Requesting the Land Entry Case File
Each request for a land entry case file must include the following information elements: pre-July 1908 general land entries require the state, land office, type of land entry, and final certificate number. Post-July 1908 general land entries require name of entryman and serial patent number. Bounty land warrants require the year of the Congressional act authorizing the warrant, acreage, and warrant number. The location of each of these within the tract book entry is illustrated on the next two pages.
1. The type of land entry was usually abbreviated in the far left column: homestead entries were abbreviated as "Hd," "H.E.," or "Home." Cash entries as "P.a." or "Pre. 41" for the preemption act of 1841, or "cash." Timber Culture entries as "T.C." and Desert Entries as "D.E." Military bounty land warrant entries were routinely cited on either the left or right tract book page and varied in format but always included the year of the act authorizing the warrant, the acreage, and the warrant number. Enter the type of entry on your request form. (Also shown: the legal description of the land entries; the acreage; price or fees paid; and the name of the entryman.)
2. The final certificate or patent number is located in different parts of the right tract book page, depending on the type of land entry and its disposition. It it was a cash or preemption entry, the file number was usually recorded under the column headed "Number of receipt and certificate of purchase." If it was a Homestead Act, Timber Culture Act, or Desert Land Act entry, this column was used for the application number. The file number for these types of entries was usually entered under the "By Whom Patented" or "Date of Patent" columns as the final certificate, "F.C." Or patent, "Pat." number. Enter the appropriate number on your request form.
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I assume the references to Tract Book Illustrations means there is supposed to be a sample plat, perhaps in a printed version of the document (but not the online version, apparently).
This looks like material for the 2012 Rendezvous.
