..Channel Modes 
b <nick!ident@host> = Bans the nick!ident@host from the channel [requires at least halfop to set] 

c = Block messages containing mIRC color codes [requires at least chanop to set] 

e <nick!ident@host> = Overrides a ban for matching users [requires at least halfop to set]

I <nick!ident@host> = Overrides +i for matching users [requires at least halfop to set] 

f <floodparams> = Flood protection (for more info see /HELPOP CHMODEF) [requires at least chanop to set] 

i = A user must be invited to join the channel [requires at least halfop to set] 

j <joins:sec> = Throttle joins per-user to 'joins' per 'sec' seconds [requires at least chanop to set]
 
k <key> = Users must specify <key> to join [requires at least halfop to set] 

l <number of max users> = Channel may hold at most <number> of users [requires at least chanop to set] 

m = Moderated channel (only +vhoaq users may speak) [requires at least halfop to set]

n = Users outside the channel can not send PRIVMSGs to the channel [requires at least halfop to set]
 
p = Private channel [requires at least chanop to set] All modes are applied by using:

r = The channel is registered (settable by services only)

s = Secret channel [requires at least chanop to set] All modes are applied by using:

t = Only +hoaq may change the topic [requires at least halfop to set] All modes are applied by using:

z = Only Clients on a Secure Connection (SSL) can join [requires at least chanop to set] All modes are applied by using:

A = Server/Net Admin only channel (settable by Admins)

C = No CTCPs allowed in the channel [requires at least chanop to set] 

G = Filters out all Bad words in messages with <censored> [requires at least chanop to set] 

M = Must be using a registered nick (+r), or have voice access to talk [requires at least chanop to set]

K = /KNOCK is not allowed [requires at least chanop to set] All modes are applied by using:

 L <chan2> = Channel link (If +l is full, the next user will auto-join <chan2>) [requires owner to set]

O = IRC Operator only channel (settable by IRCops) All modes are applied by using:

Q = No kicks allowed [requires at least chanop to set]

R = Only registered (+r) users may join the channel [requires at least chanop to set] 

S = Strips mIRC color codes [requires at least chanop to set] All modes are applied by using:

T = No NOTICEs allowed in the channel [requires at least chanop to set]

V = /INVITE is not allowed [requires at least chanop to set]

u = Auditorium mode (/names and /who #channel only show channel ops) [requires owner to set]


USER MODES


 d = Makes it so you can not receive channel PRIVMSGs (Deaf) All modes are applied by using:

g = Can read & send to GlobOps, and LocOps All modes are applied by using:

h = Available for Help (Help Operator) All modes are applied by using:

i = Invisible (Not shown in /WHO searches) All modes are applied by using:

p = Hide all channels in /whois and /who All modes are applied by using:

q = Only U:lines can kick you (Services Admins/Net Admins only) All modes are applied by using:

r = Identifies the nick as being Registered (settable by services only) All modes are applied by using:

s = Can listen to Server notices All modes are applied by using:

t = Says that you are using a /VHOST All modes are applied by using:

v = Receive infected DCC send rejection notices All modes are applied by using:

w = Can listen to Wallop messages All modes are applied by using:

x = Gives the user Hidden Hostname (security) All modes are applied by using:

z = Marks the client as being on a Secure Connection (SSL)

B = Marks you as being a Bot All modes are applied by using:
 
G = Filters out all Bad words in your messages with <censored> 

H = Hide IRCop status in /WHO and /WHOIS. (IRC Operators only)
 
R = Allows you to only receive PRIVMSGs/NOTICEs from registered (+r)

S = For Services only. (Protects them)

T = Prevents you from receiving CTCPs

V = Marks the client as a WebTV user

W = Lets you see when people do a /WHOIS on you (IRC Operators only)