<s>
WAITS	B-Application
was	O
a	O
heavily	O
modified	O
variant	O
of	O
Digital	O
Equipment	O
Corporation	O
's	O
Monitor	O
operating	B-General_Concept
system	I-General_Concept
(	O
later	O
renamed	O
to	O
,	O
and	O
better	O
known	O
as	O
,	O
"	O
TOPS-10	B-Operating_System
"	O
)	O
for	O
the	O
PDP-6	B-Device
and	O
PDP-10	B-Device
mainframe	B-Architecture
computers	I-Architecture
,	O
used	O
at	O
the	O
Stanford	O
Artificial	O
Intelligence	O
Laboratory	O
(	O
SAIL	O
)	O
from	O
the	O
mid-1960s	O
up	O
until	O
1991	O
;	O
the	O
mainframe	B-Architecture
computer	I-Architecture
it	O
ran	O
on	O
also	O
went	O
by	O
the	O
name	O
of	O
"	O
SAIL	O
"	O
.	O
</s>
<s>
There	O
was	O
never	O
an	O
"	O
official	O
"	O
expansion	O
of	O
WAITS	B-Application
,	O
but	O
a	O
common	O
variant	O
was	O
"	O
West-coast	O
Alternative	O
to	O
ITS	B-Application
"	O
;	O
another	O
variant	O
was	O
"	O
Worst	O
Acronym	O
Invented	O
for	O
a	O
Timesharing	O
System	O
"	O
.	O
</s>
<s>
Though	O
WAITS	B-Application
was	O
less	O
visible	O
than	O
ITS	B-Application
,	O
there	O
was	O
frequent	O
exchange	O
of	O
people	O
and	O
ideas	O
between	O
the	O
two	O
communities	O
,	O
and	O
innovations	O
pioneered	O
at	O
WAITS	B-Application
exerted	O
enormous	O
indirect	O
influence	O
.	O
</s>
<s>
WAITS	B-Application
alumni	O
at	O
Xerox	O
PARC	O
and	O
elsewhere	O
also	O
played	O
major	O
roles	O
in	O
the	O
developments	O
that	O
led	O
to	O
the	O
Xerox	B-Operating_System
Star	I-Operating_System
,	O
the	O
Macintosh	B-Device
,	O
and	O
the	O
SUN	B-Device
workstation	I-Device
(	O
later	O
sold	O
by	O
Sun	O
Microsystems	O
)	O
.	O
</s>
<s>
The	O
early	O
screen	O
modes	O
of	O
Emacs	B-Application
,	O
for	O
example	O
,	O
were	O
directly	O
inspired	O
by	O
WAITS	B-Application
 '	O
"	O
E	O
"	O
editor	O
–	O
one	O
of	O
a	O
family	O
of	O
editors	O
that	O
were	O
the	O
first	O
to	O
do	O
real-time	O
editing	O
,	O
in	O
which	O
the	O
editing	O
commands	O
were	O
invisible	O
and	O
where	O
one	O
typed	O
text	O
at	O
the	O
point	O
of	O
insertion/overwriting	O
.	O
</s>
<s>
Also	O
invented	O
there	O
were	O
"	O
bucky	O
bits	O
"	O
-	O
thus	O
,	O
the	O
"	O
Alt	O
"	O
key	O
on	O
every	O
IBM	B-Device
PC	I-Device
is	O
a	O
WAITS	B-Application
legacy	O
.	O
</s>
<s>
One	O
WAITS	B-Application
feature	O
very	O
notable	O
in	O
pre-Web	O
days	O
was	O
a	O
news-wire	O
search	O
engine	O
called	O
NS	O
(	O
for	O
News	O
Service	O
)	O
that	O
allowed	O
WAITS	B-Application
hackers	O
to	O
instantly	O
find	O
,	O
store	O
and	O
be	O
notified	O
about	O
selected	O
AP	O
and	O
New	O
York	O
Times	O
news-wire	O
stories	O
by	O
doing	O
searches	O
using	O
arbitrary	O
combinations	O
of	O
words	O
.	O
</s>
<s>
News	O
story	O
retrieval	O
by	O
such	O
search	O
was	O
instantaneous	O
because	O
each	O
story	O
was	O
automatically	O
indexed	O
by	O
all	O
its	B-Application
words	O
when	O
it	O
came	O
in	O
over	O
the	O
wire	O
.	O
</s>
