<s>
Gypsy	B-Protocol
was	O
the	O
first	O
document	B-General_Concept
preparation	I-General_Concept
system	I-General_Concept
based	O
on	O
a	O
mouse	B-Device
and	O
graphical	B-Application
user	I-Application
interface	I-Application
to	O
take	O
advantage	O
of	O
those	O
technologies	O
to	O
virtually	O
eliminate	O
modes	B-General_Concept
.	O
</s>
<s>
Its	O
operation	O
would	O
be	O
familiar	O
to	O
any	O
user	O
of	O
a	O
modern	O
personal	B-Device
computer	I-Device
.	O
</s>
<s>
It	O
was	O
the	O
second	O
WYSIWYG	B-Application
document	B-General_Concept
preparation	I-General_Concept
program	B-Application
,	O
a	O
successor	O
to	O
the	O
Bravo	B-Protocol
on	O
the	O
Xerox	B-Device
Alto	I-Device
personal	B-Device
computer	I-Device
.	O
</s>
<s>
The	O
code	O
was	O
built	O
on	O
Bravo	B-Protocol
as	O
a	O
base	O
and	O
the	O
developers	O
of	O
Bravo	B-Protocol
,	O
including	O
Tom	O
Malloy	O
,	O
Butler	O
Lampson	O
and	O
Charles	O
Simonyi	O
provided	O
technical	O
support	O
to	O
the	O
effort	O
.	O
</s>
<s>
Drag-through	O
selection	O
,	O
double-click	O
,	O
and	O
cut-copy-paste	O
were	O
quickly	O
adopted	O
by	O
Dan	O
Ingalls	O
for	O
Smalltalk	B-Application
,	O
beginning	O
with	O
Smalltalk-76	O
.	O
</s>
<s>
The	O
ideas	O
and	O
techniques	O
were	O
refined	O
in	O
the	O
Apple	B-Device
Lisa	I-Device
and	O
Macintosh	B-Device
and	O
spread	O
from	O
to	O
most	O
modern	O
document	B-General_Concept
preparation	I-General_Concept
systems	O
.	O
</s>
<s>
Although	O
similar	O
in	O
capabilities	O
to	O
the	O
then-current	O
version	O
of	O
Bravo	B-Protocol
,	O
the	O
user	B-Application
interface	I-Application
of	O
Gypsy	B-Protocol
was	O
radically	O
different	O
.	O
</s>
<s>
In	O
both	O
Bravo	B-Protocol
and	O
Gypsy	B-Protocol
,	O
a	O
command	O
operated	O
on	O
the	O
current	O
selection	O
.	O
</s>
<s>
But	O
Bravo	B-Protocol
had	O
modes	B-General_Concept
and	O
Gypsy	B-Protocol
did	O
n't	O
.	O
</s>
<s>
In	O
Bravo	B-Protocol
,	O
the	O
effect	O
of	O
pressing	O
a	O
character	O
key	O
depended	O
on	O
the	O
current	O
mode	O
,	O
while	O
in	O
Gypsy	B-Protocol
,	O
pressing	O
a	O
character	O
key	O
by	O
itself	O
always	O
typed	O
the	O
character	O
.	O
</s>
<s>
For	O
example	O
,	O
in	O
Bravo	B-Protocol
's	O
Command	O
Mode	O
,	O
pressing	O
"	O
I	O
"	O
entered	O
Insert	O
Mode	O
.	O
</s>
<s>
In	O
Gypsy	B-Protocol
,	O
no	O
command	O
or	O
buffer	O
was	O
needed	O
to	O
insert	O
new	O
text	O
.	O
</s>
<s>
The	O
user	O
simply	O
selected	O
an	O
insertion	O
point	O
with	O
the	O
mouse	B-Device
and	O
typed	O
the	O
new	O
text	O
.	O
</s>
<s>
Among	O
other	O
differences	O
between	O
Gypsy	B-Protocol
and	O
the	O
then-current	O
version	O
of	O
Bravo	B-Protocol
were	O
:	O
</s>
<s>
To	O
select	O
text	O
in	O
Bravo	B-Protocol
,	O
the	O
user	O
clicked	O
the	O
first	O
and	O
last	O
characters	O
to	O
be	O
selected	O
,	O
each	O
with	O
a	O
different	O
mouse	B-Device
button	O
.	O
</s>
<s>
In	O
Gypsy	B-Protocol
,	O
the	O
user	O
could	O
drag	O
from	O
the	O
first	O
to	O
the	O
last	O
character	O
while	O
holding	O
a	O
mouse	B-Device
button	O
down	O
.	O
</s>
<s>
In	O
addition	O
to	O
cut-copy-paste	O
,	O
Gypsy	B-Protocol
introduced	O
double-click	O
to	O
select	O
a	O
word	O
as	O
well	O
as	O
the	O
ability	O
to	O
change	O
the	O
style	O
of	O
a	O
text	O
selection	O
to	O
bold	O
,	O
italic	O
or	O
underlined	O
by	O
pressing	O
the	O
Control	O
key	O
(	O
also	O
called	O
"	O
Look	O
"	O
)	O
while	O
pressing	O
"	O
B	O
"	O
,	O
"	O
I	O
"	O
,	O
or	O
"	O
U	O
"	O
.	O
</s>
<s>
To	O
minimize	O
memorization	O
and	O
modes	B-General_Concept
,	O
the	O
least	O
frequently	O
used	O
commands	O
in	O
Gypsy	B-Protocol
appeared	O
in	O
a	O
clickable	O
menu	O
.	O
</s>
