<s>
systat	B-Language
is	O
a	O
BSD	B-Operating_System
UNIX	I-Operating_System
console	B-Device
application	I-Device
for	O
displaying	O
system	O
statistics	O
in	O
fullscreen	O
mode	O
using	O
ncurses/curses	O
.	O
</s>
<s>
It	O
is	O
available	O
on	O
,	O
and	O
by	O
default	O
ships	O
in	O
the	O
base	O
systems	O
of	O
,	O
FreeBSD	B-Operating_System
,	O
NetBSD	B-Device
,	O
OpenBSD	B-Operating_System
and	O
DragonFly	B-Application
BSD	I-Application
.	O
</s>
<s>
It	O
was	O
first	O
released	O
as	O
part	O
of	O
4.3BSD	B-Operating_System
in	O
.	O
</s>
<s>
Both	O
internally	O
and	O
in	O
the	O
interface	B-Application
of	I-Application
the	I-Application
user	I-Application
the	O
utility	O
consists	O
of	O
several	O
distinct	O
modules	O
and	O
tabs	O
,	O
referred	O
to	O
as	O
"	O
displays	O
"	O
in	O
FreeBSD	B-Operating_System
,	O
NetBSD	B-Device
and	O
DragonFly	O
,	O
and	O
"	O
views	O
"	O
in	O
OpenBSD	B-Operating_System
,	O
which	O
are	O
automatically	O
refreshed	O
every	O
specified	O
number	O
of	O
seconds	O
.	O
</s>
<s>
These	O
modules	O
cover	O
all	O
system	O
components	O
,	O
including	O
statistics	O
resembling	O
vmstat	B-Device
,	O
iostat	B-Device
and	O
netstat	B-Application
in	O
all	O
of	O
the	O
BSDs	B-Operating_System
,	O
as	O
well	O
as	O
pf	B-Protocol
and	O
sensors	B-Application
views	O
in	O
some	O
of	O
the	O
BSDs	B-Operating_System
.	O
</s>
<s>
The	O
systat	B-Language
utility	O
is	O
notably	O
absent	O
from	O
OS	B-Operating_System
X	I-Operating_System
,	O
where	O
a	O
GUI-based	O
Activity	B-Operating_System
Monitor	I-Operating_System
performs	O
similar	O
functions	O
.	O
</s>
