AT - server messages - 2 byte SID
at - server messages - 3 byte SID

everything else mainly applies to the client.

form requests ("invokes"): f1, f2, t1
keyword requests (by number): k1, k2, U1, U2, U3, U4, Ca

Delete your profile - 2d
Log off - LO

eB - file library request
mD - download file
3l - auto tour room
cV - go to private chatroom, requires following code:
 uni_start_stream_wait_on 00x
 uni_wait_on
 sm_check_domain
 de_validate 
 de_start_extraction
 buf_set_token <"cV">
 de_get_data
 de_end_extraction
 buf_close_buffer
 man_close_update
 uni_end_stream 

aR - request advertisements (nice target for a Junkbuster?)

the rest of the tokens are taken from a message on observers.net. The last word refers to what area the token
refers to (e.g collman2):

Ki - takes you to keywords
nt - switch screen-name screen
nx - create screen-name screen
Ln - locate member online
3Y, 3X - buddy list
ji - get member profile

   Ca - Classic Rainman
   MR - Conference Room
   cG - Auditorium
   bE - Message board (boards 0 to 5020)
   58 - Message board (5121-10240)
   77 - Message board (10241-15360)
   ^8 - Message board (15361+)
   f1 - Form_edit
   K1 - Lib_edit
   t1 - Rainman Plus Page
   U1 - Rainman Plus Page
   lq - Search Database (local)
   le - Search Database (global)
   2e = Search Database (Unix)
   eB = File Library
   mF = File Description
   mD = Download Now
   mq = Download Later
   gv All casino games special tokens casino
   $A Add product to shopping cart clerk
   $B Request billing information clerk
   $C Begin checkout process clerk
   $D Delete product from cart clerk
   $F Request clerk form w/pop clerk
   $I Show store information clerk
   $L List items in shopping cart clerk
   $M Get billing method clerk
   $P Show product desc clerk
   $S Request shipping information clerk
   $V View product from cart clerk
   $b Process internal billing info clerk
   $d Delete product from cart clerk
   $f Request clerk form clerk
   $E modify_cart_entry clerk2
   $G get_product(ext id appd to ft 1) clerk2
   $Q process quantity clerk2
   $R retrieve_product(int_id=hard_cod clerk2
   $a add_store clerk2 $c display_cart clerk2
   $e delete_entry_from_cart clerk2
   $g request_store_id(ext_id) clerk2
   $h process_store_id(ext_id) clerk2
   $i process_internal_bill clerk2
   $j return_to_product_summary clerk2
   $k process_checkout clerk2
   $l process_list_option clerk2
   $m modify_store clerk2
   $n remove_from_cart_screen clerk2
   $o display_product_option clerk2
   $p display_product_summary clerk2
   $r process_radio_option clerk2
   $s display_about_this_store clerk2
   $t process_text_option clerk2
   $u copy from_bill_to clerk2
   $v process_ship_to clerk2
   $w delete_store clerk2
   $x request_cc_info clerk2
   $y process_cc_info clerk2
   $z process_bill_to clerk2
   $W enter promotional area clerk_special
   $X specify machine type clerk_special
   $Y specify product choice clerk_special
   $Z provide shipping info clerk_special d
   M Set domain - message board collector
   eT Start mail text entry collector
   C1 Request collection contents collman
   C2 Request more collection contents collman
   C3 Request lastest stories collman
   C4 Sign up for Live Wire collman
   C5 Cancel LiveWire registration collman
   C6 Reset collman domain collman
   C7 Show "where" info collman
   Ct Get indexed coll w/atoms collman
   Ca Request collection contents collman2
   Cb Request more collection contents collman2
   Cc Request latest stories collman2
   Cd Sign up for Live Wire collman2
   Ce Cancel LiveWire registration collman2
   Cf Reset collman2 domain collman2
   Cg Open Coll info for Edit collman2
   Ch Modify Coll info collman2
   Ci Act on named collection collman2
   Cj Convert Overwrite Confirm collman2
   Ck Send collman form collman2
   Cm Display item for edit collman2
   Cn Cut item from collection collman2
   Co Copy item from collection collman2
   Cp Paste item (above) to collection collman2
   Cq Paste item (below) to collection collman2
   Cr Start add item to collection collman2
   Cs Add/Update item data collman2
   &1 display acct page 1 cris2
   &2 display acct page 2 cris2
   &3 display acct page 3 cris2
   &4 select credit reason cris2
   &5 select credit type cris2
   &B print detail bill cris2
   &C add credit cris2
   &E write new credit cris2
   &F send form with pop cris2
   &G update cc info cris2
   &H add history cris2
   &K write new credit cris2
   &L select acct from list cris2
   &M load menu selection cris2
   &N write sw order cris2
   &P update payment info cris2
   &S search for account cris2
   &T generate certificate cris2
   &U update certificate cris2
   &a update address cris2
   &b display detail bill cris2
   &c display credit cris2
   &d display payment info cris2
   &e select credit reason cris2
   &f send form cris2
   &g display cc info cris2
   &h display history cris2
   &j display online status cris2
   &k select reason for new credit cris2
   &m display menu cris2
   &n select sw order type cris2
   &o update_check_auth_status cris2
   &p load pay list selection cris2
   &q update comment cris2
   &r write resubmit cris2
   &t display certificate cris2
   &u update passwords cris2
   &v update privileged cris2
   &w update acct status cris2
   &x make internal cris2
   &y make overhead cris2
   &z bump acct cris2 ZA
   ZC c64 user cancel current dialog Dialog
   ZK c64 user couldn't accept ZM Dialog
   ZN c64 user replied NO to question Dialog
   ZO c64 user accept ZM & continue Dialog
   ZY c64 user replied YES to question Dialog

   eX Mail download complete Download
   xA Download - abort Download
   xB Completed one file in album Download
   xC Completed LAST file in album Download
   xG Download - go ahead Download
   NA same as Na with escaping dungeon2
   NB update location with escaping dungeon2
   NC broadcast info with escaping dungeon2
   ND identify user with escaping dungeon2
   NE read user with escaping dungeon2
   NF write user with escaping dungeon2
   NG read reg loc with escaping dungeon2
   NH read reg nolock with escaping dungeon2
   NI write region with escaping dungeon2
   NL send time with escaping dungeon2
   NM send info with escaping dungeon2
   NP same as Np with escaping dungeon2
   NW same as Nw with escaping dungeon2
   NX user exit with escaping dungeon2
   Na D&D 2.0 entry token dungeon2
   Nb D&D 2.0 update location token dungeon2
   Nc D&D 2.0 broadcast info token dungeon2
   Nd D&D 2.0 identify user token dungeon2
   Ne D&D 2.0 read user record token dungeon2
   Nf D&D 2.0 write user record token dungeon2
   Ng D&D 2.0 read & lock region token dungeon2
   Nh D&D 2.0 read region w/o lock dungeon2
   Ni D&D 2.0 re-write region token dungeon2
   Nj D&D 2.0 send pathname token dungeon2
   Nk D&D 2.0 current timestamp token dungeon2
   Nl D&D 2.0 quest message token dungeon2
   Nm D&D 2.0 quest completed token dungeon2
   Nn D&D 2.0 save and quit token dungeon2
   No D&D 2.0 send direct chat dungeon2
   Np D&D 2.0 notify nearby new stats dungeon2
   Nt NWN2.0: gen4 List users/Lounge dungeon2
   Nu D&D 2.0 alternate load game dungeon2
   Nv debug info from D&D 2.0 dungeon2
   Nw D&D 2.0 list users from lounge dungeon2
   Nx D&D 2.0 exit token dungeon2 CU 
   Ny D&D 2.0 god tools token dungeon2
   Nz D&D 2.0 locking error token dungeon2 0* route to
   AA good thru 3/31 gateway
   Y0 Establish gateway connection gateway
   Y1 Text from Micro for gateway gateway
   Y2 Disconnect gateway gateway
   Y3 Continue sending data (pos ack) gateway
   Y4 Leaving gateway due to reset gateway
   Y5 Multi pkt gateway input gateway
   Y6 Send "do" cmd to managing host gateway
   Y7 Send input to managing host gateway
   Y8 Disc form gateway - send form gateway 
   yn gng list articles gng
   yo gng download article gng
   yp gng post article gng
   ga Set video mode for game
   gb List box for Extra Turn Mode
   gc Current pathname for this game

The observers.net message contained a bunch more, see that one if you want complete support.