Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

ACCUM_INFO
ACCUM_RESULTS
ACCUM_RESULTS_SEND
ACCUM_SCAN_RESULT
ALIAS
ALL_SPEC_CONFIG
ALMA_BANDS
BANDS
base_descr
BASELINE_INFO
BATCH_COMMAND
beam_descr
BEAM_MAP
BEAM_MAP_ELEM
BEAM_MAPS_SEP
BLKHEAD
BLKHEADstruct
BOOTSTRAP
BOUND
BOX_DATA
calibration_descr
CALIBRATOR
CHANNELS
COMMANDS
cont_descr
CONTINUUM_PLAIN
CONTINUUM_SPTIP
DAL_SHM_SEGHEAD_STRUCT
data
DATASERV_SEMS
DATASET
DECONVOL_STRUCT
DEST
DIRECTORY
drift_descr
DS_IMAGE_INFO
DSTIME
DVARS_INIT
DYNAMIC_VARIABLES
ENV_VARIABLES
ENVIRONMENT
EPH
EPH_OBJECT
EPH_STATE
EPH_TIME
FFB_CHANNELS
FFT_INFO
file_index
FITSfile
fitsfile
FIX_OPERATORS
FLUX_HISTORY
FLUX_HISTORY_ELEMENT
FLUX_INFO
FOCUS_HISTORY_ELEM
FOCUS_HISTORY_SEND
FORK_TINE
FORMULA
FORMULAS
FREQS
fswitch_descr
gauss_descr
GAUSS_INFO_RESULTS
GAUSSIAN
GAUSSIAN_FIT
general_descr
GLOBAL
GLOBAL_MEMORY
GRID_ACCUM
GSKEY
HEAD_PARAMS
HEADER
HELP_COMMANDS
HELP_H_FLAG
HELP_STRUCT
hfs_descr
HISTO_INFO
history_descr
IMAGE_DATE_STRING
IMAGE_FORKS
IMAGE_GAUSS
IMAGE_HLINE
IMAGE_LABELS
IMAGE_MARKERS
IMAGE_PSTAMPS
INDATA
index_ent
iteratorCol
LP_IMAGE_INFO
MAIL_PARSE
MAP_SCANS
MEASUREMENT
MISC_HEADER_PARAMS
MODE
MUNCH_COMMAND
MYSQL_RESPONSE
NEW_EPHEM
NGS_HELP_STRINGS
OBJECT
OBJECT_GLOBAL_MEMORY
OTF_GRID
OTF_STRUCT
PARSE_FLAGS
PARSE_STACK
PixelFilter
PLANET_LOOKUP
PLOT_BOX
plot_descr
PLOT_INFO
pointer_descr
position_descr
PROTO_LIST
QUERY_VAR
REGION_BOX
REJECTIONS
RESULT
RESULTS
RGB
SAVE_IMAGE
scan_ent
SCAN_HEADERS
SCAN_INFO
SCAN_SUM
SCAN_SUM_SEND
SCANS
semun
SHARED_GTABstruct
SHARED_LTABstruct
shell_descr
skydip_descr
SOCK
SOURCES
SPEC_5_RESULTS
SPEC_ACCUM_SET
SPEC_ATTEN
SPEC_CAL_SET
SPEC_CONFIG
SPEC_DATA_SET
SPEC_DATA_SUB_SET
SPEC_SCANS
SPECDATA
SPECTRA_DISPLAY_PARAMS
spectro_descr
STAMP
STATE
STRINGS_AND_THINGS
STURCT_KEYSYMS
TBRIGHT
tcolumn
TIME
TIP_RESULTS
TITLE_BLOCK
TSYS_ARRAY
TSYS_ELEM
TSYS_FREQ
TSYS_FREQ_ACCUM
TSYS_SEND
TSYS_WORKING_ACCUM
VERS
WINDOW
WINDOW_HEAD
wtbarr
X_AXIS_ARRAY
XBE_POS
XGR_
XGR_HEAD
XGRAPHIC_SEND
XYZ_ELEMENT