Why do some boards have brackets instead of slashes? Ex: [s4s]

Because they are unique.

Look at how the boards are grouped and you will find your answer.

[s4s] is nice board

>>1437601
The groups are really arbitrary though. They should haves ones that make a little more sense. Maybe something like this?
Anime group: /a/, /c/, /f/, /w/, /cm/, /jp/
Porn group: /b/, /d/, /e/, /h/, /s/, /u/, /y/, /hc/, /hm/, /aco/
Images/drawing group: /3/, /gd/, /i/, /ic/, /p/, /gif/, /hr/, /wsg/, /wg/
Entertainment group: /co/, /mu/, /sp/, /asp/, /lit/, /tv/, /toy/, /v/, /vg/, /vr/, /vp/, /qst/, /tg/
Life group: /adv/, /fa/, /fit/, /out/, /trv/, /ck/, /an/, /soc/
Nerd group: /cgl/, /g/, /n/, /o/, /biz/, /diy/, /sci/, /his/, /po/, /k/, /t/, /m/
World group: /bant/, /int/, /pol/, /news/
Miscellaneous group: /r9k/, /s4s/, /vip/
Containment group: /mlp/, /trash/

look how related boards are often grouped together at the top bar e.g.: [cm/hm/lgbt/y]
some boards have no other boards to be grouped together like [s4s] and this fact made it to be an inside joke among s4s users to the point it was renamed to be like it is

>>1437611
>/pol/, /asp/, /vp/, /vg/, /qst/, /soc/, /biz/
>not in containment

>>1437611
It's already grouped like that through cliques of people.

>>1437611
There's no /x/.

>>1437643
Well, there are no specific rules containing the cultures of those boards to those boards. /mlp/ was created to address ponyshit everywhere. /trash/ was created so ponyfags had a place to dump porn.

>>1437665
I was saying we reorganize the groups in the header and footer. Right now there's no semblance of organization.

>>1437670
Shit, knew I forgot something. How about the life group? Or the nerd group?

>>1437687
nerd group, probably

>>1437611
I think /bant/ should be under containment

File: __kitakami_kantai_collection_drawn_by_ama_mitsuki__9e81ade08c7403666d84d38713e94153.jpg (98KB, 777x1100px) Image search: [Google]

98KB, 777x1100px

>>1437596

>>1437611
[a / b / c / d / e / f / g / gif / h / hr / k / m / o / p / r / s / t / u / v / vg / vr / w / wg / i / ic / r9k / s4s / vip / cm / hm / lgbt / y / 3 / aco / adv / an / asp / bant / biz / cgl / ck / co / diy / fa / fit / gd / hc / his / int / jp / lit / mlp / mu / n / news / out / po / pol / qst / sci / soc / sp / tg / toy / trv / tv / vp / wsg / wsr / x]
That's the containment group.

>>1439296