What are these processors?

Code:
root@server [/]# ps -aux
USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
root         1  0.2  0.1  1512  508 ?        S    04:13   0:03 init
root         2  0.0  0.0     0    0 ?        SW   04:13   0:00 [keventd]
root         3  0.0  0.0     0    0 ?        SW   04:13   0:00 [kapmd]
root         4  0.0  0.0     0    0 ?        SWN  04:13   0:00 [ksoftirqd/0]
root         7  0.0  0.0     0    0 ?        SW   04:13   0:00 [bdflush]
root         5  0.0  0.0     0    0 ?        SW   04:13   0:00 [kswapd]
root         6  0.0  0.0     0    0 ?        SW   04:13   0:00 [kscand]
root         8  0.0  0.0     0    0 ?        SW   04:13   0:00 [kupdated]
root         9  0.0  0.0     0    0 ?        SW   04:13   0:00 [mdrecoveryd]
root        13  0.0  0.0     0    0 ?        SW   04:13   0:00 [kjournald]
root        68  0.0  0.0     0    0 ?        SW   04:13   0:00 [khubd]
root      1161  0.0  0.0     0    0 ?        SW   04:14   0:00 [kjournald]
root      3001  0.0  0.0     0    0 ?        SW   04:14   0:00 [eth0]
root      3122  0.0  0.1  1584  588 ?        S    04:14   0:00 syslogd -m 0
root      3126  0.0  0.0  1528  472 ?        S    04:14   0:00 klogd -x
nobody    3214  0.0  0.2  3640 1276 ?        S    04:14   0:00 proftpd: (accepting connections)
root      5849  0.0  0.3  3640 1552 ?        S    04:15   0:00 /usr/sbin/sshd
root      5863  0.0  0.1  2140  804 ?        S    04:15   0:00 xinetd -stayalive -pidfile /var/run/xinetd.pid
root      5872  0.0  0.2  5956 1432 ?        S    04:15   0:00 antirelayd
root      5882  0.0  0.5  7192 2688 ?        S    04:15   0:00 chkservd
mailnull  5895  0.0  0.2  6500 1388 ?        S    04:15   0:00 /usr/sbin/exim -bd -q60m
mailnull  5899  0.0  0.2  6496 1348 ?        S    04:15   0:00 /usr/sbin/exim -tls-on-connect -bd -oX 465
root      5904  0.0  0.2  2852 1368 ?        R    04:15   0:00 antirelayd
root      5917  0.0  3.5 20580 18124 ?       S    04:15   0:00 /usr/bin/spamd -d
root      5926  0.0  0.1  1576  640 ?        S    04:15   0:00 crond
root      5941  0.0  0.5  5324 2724 ?        S    04:15   0:00 /usr/local/apache/bin/httpd -DSSL
root      5946  0.0  0.2  5332 1168 ?        S    04:15   0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var
mysql     5990  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
nobody    6010  0.0  0.5  5332 2920 ?        S    04:15   0:00 /usr/local/apache/bin/httpd -DSSL
nobody    6011  0.0  0.5  5444 2928 ?        S    04:15   0:00 /usr/local/apache/bin/httpd -DSSL
nobody    6012  0.0  0.5  5328 2888 ?        S    04:15   0:00 /usr/local/apache/bin/httpd -DSSL
nobody    6013  0.0  0.5  5332 2892 ?        S    04:15   0:00 /usr/local/apache/bin/httpd -DSSL
nobody    6014  0.0  0.5  5328 2888 ?        S    04:15   0:00 /usr/local/apache/bin/httpd -DSSL
xfs       6016  0.0  0.5  5096 2796 ?        S    04:15   0:00 xfs -droppriv -daemon
root      6020  0.0  0.4  6844 2052 ?        S    04:15   0:00 sshd: john [priv]
daemon    6026  0.0  0.1  1564  564 ?        S    04:15   0:00 /usr/sbin/atd
nobody    6114  0.0  0.5  5328 2916 ?        S    04:15   0:00 /usr/local/apache/bin/httpd -DSSL
named     6165  0.0  0.5 36216 2684 ?        S    04:15   0:00 /usr/sbin/named -u named
mysql     6172  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mysql     6173  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mysql     6174  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mysql     6175  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mysql     6176  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mysql     6179  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mysql     6180  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mysql     6181  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mysql     6182  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
mailnull  6184  0.0  0.7  5592 3872 ?        S    04:15   0:00 /usr/bin/perl /usr/local/cpanel/bin/eximstats
mysql     6185  0.0  2.2 31828 11488 ?       S    04:15   0:00 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --
john   6206  0.0  0.4  6992 2296 ?        S    04:15   0:00 sshd: john@pts/0
root      6210  0.0  1.0  6872 5164 ?        SN   04:15   0:00 cpanellogd - sleeping for logs
john   6216  0.0  0.2  5340 1328 pts/0    S    04:15   0:00 -bash
root      6250  0.0  0.8  5748 4276 ?        S    04:15   0:00 cppop - accepting on port 110
root      6275  0.0  0.1  5296  996 pts/0    S    04:15   0:00 su -
root      6292  0.0  0.1  4628  576 ?        S    04:15   0:00 rhnsd --interval 240
root      6305  0.0  0.5  7180 2592 ?        S    04:15   0:00 /usr/bin/perl /usr/local/bin/ipalert_statd
root      6325  0.0  0.0  1528  472 ?        S    04:15   0:00 /usr/sbin/portsentry -tcp
root      6337  0.0  0.3  3452 1624 ?        S    04:15   0:00 /usr/local/urchin/bin/urchinwebd -f /usr/local/urchin/var/urchinwebd.
nobody    6338  0.0  0.3  3452 1628 ?        S    04:15   0:00 /usr/local/urchin/bin/urchinwebd -f /usr/local/urchin/var/urchinwebd.
nobody    6339  0.0  0.3  3452 1628 ?        S    04:15   0:00 /usr/local/urchin/bin/urchinwebd -f /usr/local/urchin/var/urchinwebd.
nobody    6340  0.0  0.3  3452 1628 ?        S    04:15   0:00 /usr/local/urchin/bin/urchinwebd -f /usr/local/urchin/var/urchinwebd.
nobody    6341  0.0  0.3  3452 1628 ?        S    04:15   0:00 /usr/local/urchin/bin/urchinwebd -f /usr/local/urchin/var/urchinwebd.
nobody    6342  0.0  0.3  3452 1628 ?        S    04:15   0:00 /usr/local/urchin/bin/urchinwebd -f /usr/local/urchin/var/urchinwebd.
root      6343  0.0  0.2  5340 1392 pts/0    S    04:15   0:00 -bash
nobody    6394  0.0  0.0   668  388 ?        S    04:15   0:00 /usr/local/urchin/bin/urchind
root      6410  0.0  0.0  1572  400 ?        S    04:15   0:00 mdadm --monitor --scan
root      6422  0.0  2.4 12152 12148 ?       SL   04:15   0:00 mdmpd
root      6425  0.0  0.0     0    0 ?        SW   04:15   0:00 [loop0]
root      6426  0.0  0.0     0    0 ?        SW   04:15   0:00 [kjournald]
root      6447  0.0  0.0  1504  420 tty1     S    04:15   0:00 /sbin/mingetty tty1
root      6448  0.0  0.0  1508  424 tty2     S    04:15   0:00 /sbin/mingetty tty2
root      6449  0.0  0.0  1512  428 tty3     S    04:15   0:00 /sbin/mingetty tty3
root      6450  0.0  0.0  1516  424 tty4     S    04:15   0:00 /sbin/mingetty tty4
root      6451  0.0  0.0  1508  424 tty5     S    04:15   0:00 /sbin/mingetty tty5
root      6452  0.0  0.0  1516  424 tty6     S    04:15   0:00 /sbin/mingetty tty6
nobody    6756  0.0  0.5  5332 2912 ?        S    04:18   0:00 /usr/local/apache/bin/httpd -DSSL
nobody    6898  0.0  0.5  5332 2896 ?        S    04:20   0:00 /usr/local/apache/bin/httpd -DSSL
nobody    6901  0.0  0.5  5328 2892 ?        S    04:20   0:00 /usr/local/apache/bin/httpd -DSSL
root      8161  0.0  1.1  7172 5708 ?        S    04:38   0:00 cpsrvd - waiting for connections
cpanel    8175  0.0  0.3  3668 1680 ?        S    04:38   0:00 /usr/bin/stunnel-4.04local /usr/local/cpanel/etc/stunnel/default/stun
nobody    8295  0.0  0.4  3772 2168 ?        S    04:42   0:00 proftpd: connected: localhost (127.0.0.1:32874)
root      8307  0.0  0.1  2736  768 pts/0    R    04:43   0:00 ps -aux
root@server [/]#
Just wondering what are the processors in bold?? are they needed?

 

 

 

 

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