Here are the data structures with brief descriptions:

AllGlobals
ARGBUFFER
bit_field
BrAcKeTiNdEx
BrAcKeTiNfO
bufIPstruct
C_const
CbUf
ChAnNeL
COST
dbase
DICTIONARY
DICTIONARY_ELEMENT
DiStRiBuTe
dollar_buf
DoLlArS
DoLoOp
DuBiOuS
EEdge
EGraph
ENode
ExPrEsSiOn
FaCdOlLaR
factorized_poly
FiLe
FiLeDaTa
FiLeInDeX
FixedGlobals
fixedset
FUN_INFO
FuNcTiOn
gcd_heuristic_failed
HANDLERS
InDeX
indexblock
InDeXeNtRy
iniinfo
INSIDEINFO
KEYWORD
KEYWORDV
LIST
longMultiStruct
M_const
MGraph
MiNmAx
MNode
MODNUM
MoDoPtDoLlArS
monomial_larger
N_const
nameblock
NaMeNode
NaMeTree
NeStInG
NoDe
O_const
objects
OPTIMIZE
OPTIMIZERESULT
P_const
ParallelVars
PaRtI
PeRmUtE
PeRmUtEp
PF_BUFFER
poly
POLYMOD
PoSiTiOn
PRELOAD
pReVaR
PROCEDURE
R_const
ReNuMbEr
S_const
SeTs
SETUPPARAMETERS
SHvariables
sOrT
SpecTatoR
StOrEcAcHe
STOREHEADER
StreaM
SuBbUf
SWITCH
SWITCHTABLE
SyMbOl
T_const
TaBlEbAsE
TaBlEbAsEsUbInDeX
TaBlEs
TrAcEn
TrAcEs
tree
VaRrEnUm
VeCtOr
X_const