<s>
A	O
toolkit	B-Library
is	O
an	O
assembly	O
of	O
tools	O
;	O
set	O
of	O
basic	O
building	O
units	O
for	O
user	O
interfaces	O
.	O
</s>
<s>
The	O
word	O
toolkit	B-Library
may	O
refer	O
to	O
:	O
</s>
