can anybody tell the meaning for all that are given below:-

it's urgent, because until i do not understand the meaning for the following i can't do tunning for the mysql
it is taken from the my.cnf



max_connections =
key_buffer =
myisam_sort_buffer_size =
join_buffer_size =
read_buffer_size =
sort_buffer_size =
table_cache =
thread_cache_size =
interactive_timeout =
wait_timeout =
connect_timeout =
max_allowed_packet =
max_connect_errors =
query_cache_limit =
query_cache_size =
query_cache_type =
tmp_table_size =
skip-innodb




[mysqld_safe]
open_files_limit =

[mysqldump]
quick
max_allowed_packet =

[myisamchk]
key_buffer =
sort_buffer =
read_buffer =
write_buffer =

[mysqlhotcopy]
interactive-timeout



Thanks in advance