<s>
Structure	B-Language
and	I-Language
Interpretation	I-Language
of	I-Language
Computer	I-Language
Programs	I-Language
,	I-Language
JavaScript	I-Language
Edition	I-Language
(	O
SICP	B-Language
JS	I-Language
)	O
is	O
an	O
adaptation	O
of	O
the	O
computer	B-General_Concept
science	I-General_Concept
textbook	O
Structure	B-Language
and	I-Language
Interpretation	I-Language
of	I-Language
Computer	I-Language
Programs	I-Language
(	O
SICP	B-Language
)	O
.	O
</s>
<s>
It	O
teaches	O
fundamental	O
principles	O
of	O
computer	B-General_Concept
programming	I-General_Concept
,	O
including	O
recursion	O
,	O
abstraction	B-Application
,	O
modularity	B-Architecture
,	O
and	O
programming	O
language	O
design	B-Application
and	O
implementation	B-Application
.	O
</s>
<s>
While	O
the	O
original	O
version	O
of	O
SICP	B-Language
uses	O
the	O
programming	O
language	O
Scheme	B-Language
,	O
this	O
edition	O
uses	O
the	O
programming	O
language	O
JavaScript	B-Language
.	O
</s>
<s>
Like	O
its	O
original	O
,	O
SICP	B-Language
JS	I-Language
focuses	O
on	O
discovering	O
general	O
patterns	O
for	O
solving	O
specific	O
problems	O
,	O
and	O
building	O
software	O
systems	O
that	O
make	O
use	O
of	O
those	O
patterns	O
.	O
</s>
<s>
The	O
book	O
describes	O
computer	B-General_Concept
science	I-General_Concept
concepts	O
using	O
JavaScript	B-Language
.	O
</s>
<s>
It	O
also	O
uses	O
a	O
virtual	B-Architecture
register	B-Application
machine	I-Application
and	O
assembler	O
to	O
implement	O
JavaScript	B-Language
interpreters	B-Application
and	O
compilers	B-Language
.	O
</s>
<s>
The	O
JavaScript	B-Language
programs	O
are	O
licensed	O
under	O
the	O
GNU	B-License
Public	I-License
License	I-License
3.0	I-License
.	O
</s>
<s>
SICP	B-Language
JS	I-Language
has	O
been	O
used	O
in	O
the	O
course	O
CS1101S	O
at	O
NUS	O
since	O
2012	O
.	O
</s>
<s>
While	O
the	O
book	O
focuses	O
on	O
principles	O
,	O
models	O
and	O
abstractions	B-Application
for	O
programming	O
rather	O
than	O
specific	O
programming	O
languages	O
,	O
all	O
examples	O
in	O
the	O
original	O
SICP	B-Language
are	O
written	O
in	O
the	O
programming	O
language	O
Scheme	B-Language
.	O
</s>
<s>
SICP	B-Language
JS	I-Language
uses	O
the	O
language	O
JavaScript	B-Language
instead	O
of	O
Scheme	B-Language
.	O
</s>
<s>
Since	O
JavaScript	B-Language
shares	O
its	O
functional	O
core	O
with	O
Scheme	B-Language
,	O
the	O
adaptation	O
is	O
straightforward	O
and	O
mostly	O
literal	O
in	O
the	O
first	O
three	O
chapters	O
.	O
</s>
<s>
The	O
evaluator	B-Application
and	O
compiler	B-Language
in	O
chapter	O
five	O
introduce	O
a	O
subtle	O
stack	O
discipline	O
to	O
support	O
return	O
statements	O
(	O
a	O
prominent	O
feature	O
of	O
statement-oriented	O
languages	O
)	O
without	O
sacrificing	O
tail	O
recursion	O
.	O
</s>
<s>
Source	O
is	O
a	O
series	O
of	O
sublanguages	O
of	O
JavaScript	B-Language
,	O
originally	O
inspired	O
by	O
,	O
Douglas	O
Crockford	O
.	O
</s>
<s>
It	O
comprises	O
the	O
languages	O
Source	O
§1	O
,	O
Source	O
§2	O
,	O
Source	O
§3	O
and	O
Source	O
§4	O
,	O
corresponding	O
to	O
the	O
respective	O
chapters	O
of	O
SICP	B-Language
JS	I-Language
.	O
</s>
<s>
These	O
languages	O
are	O
implemented	O
by	O
the	O
Source	O
Academy	O
,	O
a	O
web-based	O
programming	O
environment	O
that	O
features	O
various	O
tools	O
to	O
support	O
the	O
readers	O
of	O
SICP	B-Language
JS	I-Language
.	O
</s>
