<s>
Autodesk	B-Application
Revit	I-Application
is	O
a	O
building	B-Architecture
information	I-Architecture
modelling	I-Architecture
software	O
tool	O
for	O
architects	O
,	O
landscape	O
architects	O
,	O
structural	O
engineers	O
,	O
mechanical	O
,	O
electrical	O
,	O
and	O
plumbing	O
(	O
MEP	O
)	O
engineers	O
,	O
designers	O
and	O
contractors	O
.	O
</s>
<s>
The	O
original	O
software	O
was	O
developed	O
by	O
Charles	O
River	O
Software	O
,	O
founded	O
in	O
1997	O
,	O
renamed	O
Revit	B-Application
Technology	O
Corporation	O
in	O
2000	O
,	O
and	O
acquired	O
by	O
Autodesk	O
in	O
2002	O
.	O
</s>
<s>
Revit	B-Application
is	O
4D	O
building	B-Architecture
information	I-Architecture
modeling	I-Architecture
application	O
capable	O
with	O
tools	O
to	O
plan	O
and	O
track	O
various	O
stages	O
in	O
the	O
building	O
's	O
lifecycle	O
,	O
from	O
concept	O
to	O
construction	O
and	O
later	O
maintenance	O
and/or	O
demolition	O
.	O
</s>
<s>
Charles	O
River	O
Software	O
was	O
founded	O
in	O
Newton	O
,	O
Massachusetts	O
,	O
on	O
October	O
31	O
,	O
1997	O
,	O
by	O
Leonid	O
Raiz	O
and	O
Irwin	O
Jungreis	O
,	O
key	O
developers	O
of	O
PTC	O
's	O
Pro/Engineer	B-Algorithm
software	O
for	O
mechanical	O
design	O
,	O
with	O
the	O
intent	O
of	O
bringing	O
the	O
power	O
of	O
parametric	O
modeling	O
to	O
the	O
building	O
industry	O
(	O
PTC	O
had	O
previously	O
tried	O
and	O
failed	O
to	O
market	O
its	O
recently	O
acquired	O
Reflex	B-Algorithm
software	O
to	O
the	O
construction	O
sector	O
)	O
.	O
</s>
<s>
With	O
funding	O
from	O
venture	O
capitalists	O
Atlas	O
Venture	O
and	O
North	O
Bridge	O
Venture	O
Partners	O
,	O
Raiz	O
and	O
Jungreis	O
hired	O
several	O
software	O
developers	O
and	O
architects	O
and	O
began	O
developing	O
Revit	B-Application
in	O
C++	B-Language
on	O
the	O
Microsoft	B-Application
Windows	I-Application
platform	O
.	O
</s>
<s>
In	O
1999	O
they	O
hired	O
Dave	O
Lemont	O
as	O
CEO	O
and	O
recruited	O
board	O
members	O
Jon	O
Hirschtick	O
,	O
founder	O
of	O
SolidWorks	B-Application
,	O
and	O
Arol	O
Wolford	O
,	O
founder	O
of	O
CMD	O
Group	O
.	O
</s>
<s>
The	O
company	O
was	O
renamed	O
Revit	B-Application
Technology	O
Corporation	O
in	O
January	O
2000	O
.	O
</s>
<s>
Autodesk	O
,	O
best	O
known	O
for	O
its	O
AutoCAD	B-Algorithm
line	O
of	O
products	O
,	O
purchased	O
Revit	B-Application
Technology	O
Corporation	O
for	O
US$133	O
million	O
in	O
2002	O
.	O
</s>
<s>
With	O
their	O
Revit	B-Application
platform	O
,	O
Autodesk	O
is	O
a	O
significant	O
player	O
in	O
the	O
BIM	B-Architecture
market	O
together	O
with	O
Tekla	O
Structures	O
Trimble	O
,	O
Bentley	O
Systems	O
and	O
the	O
Nemetschek	O
group	O
(	O
owner	O
of	O
Graphisoft	O
's	O
BIM	B-Architecture
application	O
ArchiCAD	B-Application
,	O
plus	O
solutions	O
including	O
Allplan	O
and	O
Vectorworks	B-Application
)	O
,	O
among	O
others	O
.	O
</s>
<s>
From	O
the	O
outset	O
,	O
Revit	B-Application
was	O
intended	O
to	O
allow	O
architects	O
and	O
other	O
building	O
professionals	O
to	O
design	O
and	O
document	O
a	O
building	O
by	O
creating	O
a	O
parametric	O
three-dimensional	O
model	O
that	O
included	O
both	O
the	O
geometry	O
and	O
non-geometric	O
design	O
and	O
construction	O
information	O
,	O
which	O
is	O
also	O
known	O
as	O
building	B-Architecture
information	I-Architecture
modeling	I-Architecture
or	O
BIM	B-Architecture
(	O
1975	O
Eastman	O
C	O
.	O
)	O
.	O
</s>
<s>
At	O
the	O
time	O
,	O
several	O
other	O
software	O
packages	O
—	O
such	O
as	O
ArchiCAD	B-Application
and	O
Reflex	B-Algorithm
—	O
provided	O
a	O
three-dimensional	O
virtual	B-Architecture
building	I-Architecture
model	O
,	O
and	O
let	O
the	O
user	O
control	O
individual	O
components	O
via	O
parameters	O
(	O
parametric	O
components	O
)	O
.	O
</s>
<s>
Two	O
key	O
differences	O
in	O
Revit	B-Application
were	O
that	O
users	O
created	O
parametric	O
components	O
in	O
a	O
graphical	O
"	O
family	O
editor	O
"	O
rather	O
than	O
a	O
programming	O
language	O
,	O
and	O
the	O
model	O
captured	O
all	O
relationships	O
between	O
components	O
,	O
views	O
,	O
and	O
annotations	O
so	O
that	O
a	O
change	O
to	O
any	O
element	O
automatically	O
propagated	O
to	O
keep	O
the	O
model	O
consistent	O
.	O
</s>
<s>
The	O
concept	O
of	O
bi-directional	B-General_Concept
associativity	O
between	O
components	O
,	O
views	O
,	O
and	O
annotations	O
was	O
a	O
distinguishing	O
feature	O
of	O
Revit	B-Application
for	O
many	O
releases	O
.	O
</s>
<s>
The	O
ease	O
of	O
making	O
changes	O
inspired	O
the	O
name	O
Revit	B-Application
,	O
a	O
contraction	O
of	O
Revise-Instantly	O
.	O
</s>
<s>
At	O
the	O
heart	O
of	O
Revit	B-Application
is	O
a	O
parametric	O
change	O
propagation	O
engine	O
that	O
relied	O
on	O
a	O
new	O
technology	O
,	O
context-driven	O
parametrics	O
,	O
that	O
was	O
more	O
scalable	O
than	O
the	O
variational	O
and	O
history-driven	O
parametrics	O
used	O
in	O
mechanical	O
CAD	B-Application
software	I-Application
.	O
</s>
<s>
Revit	B-Application
version	O
1.0	O
was	O
released	O
on	O
April	O
5	O
,	O
2000	O
.	O
</s>
<s>
Licensing	O
was	O
controlled	O
by	O
an	O
entirely	O
automatic	O
process	O
,	O
an	O
innovation	O
at	O
a	O
time	O
when	O
human	O
intervention	O
and	O
manual	O
transmission	O
of	O
authorization	O
codes	O
was	O
required	O
to	O
buy	O
other	O
types	O
of	O
design	B-Application
software	I-Application
.	O
</s>
<s>
Autodesk	O
released	O
several	O
versions	O
of	O
Revit	B-Application
after	O
2004	O
.	O
</s>
<s>
In	O
2005	O
Revit	B-Application
Structure	I-Application
was	O
introduced	O
,	O
then	O
in	O
2006	O
Revit	B-Application
MEP	I-Application
.	O
</s>
<s>
After	O
the	O
2006	O
release	O
Revit	B-Application
Building	O
was	O
renamed	O
Revit	B-Application
Architecture	I-Application
.	O
</s>
<s>
In	O
2011	O
Dynamo	O
was	O
released	O
in	O
beta	O
form	O
allowing	O
first	O
glimpses	O
of	O
directly	O
programming	O
the	O
behavior	O
of	O
hosted	O
components	O
through	O
a	O
drag	O
and	O
drop	O
node	B-Data_Structure
interface	O
.	O
</s>
<s>
This	O
is	O
similar	O
to	O
the	O
way	O
the	O
visual	B-Language
programming	I-Language
language	I-Language
Grasshopper	B-Algorithm
3d	I-Algorithm
works	O
on	O
objects	O
in	O
Rhinoceros	B-Algorithm
3D	I-Algorithm
.	O
</s>
<s>
In	O
2012	O
Revit	B-Application
LT	O
became	O
the	O
newest	O
version	O
of	O
Revit	B-Application
on	O
the	O
market	O
.	O
</s>
<s>
It	O
was	O
a	O
feature	O
limited	O
or	O
Lite	O
version	O
of	O
Revit	B-Application
which	O
excluded	O
features	O
such	O
as	O
rendering	O
and	O
multi-user	O
environments	O
.	O
</s>
<s>
In	O
2013	O
,	O
Autodesk	O
began	O
introducing	O
rental	O
licensing	O
for	O
some	O
of	O
its	O
products	O
,	O
including	O
Revit	B-Application
.	O
</s>
<s>
Since	O
Revit	B-Application
2013	O
the	O
different	O
disciplines	O
have	O
been	O
rolled	O
into	O
one	O
product	O
,	O
simply	O
called	O
Revit	B-Application
.	O
</s>
<s>
Autodesk	O
sells	O
several	O
packages	O
or	O
'	O
industry	O
collections	O
 '	O
;	O
Revit	B-Application
is	O
included	O
in	O
the	O
AEC	O
Collection	O
.	O
</s>
<s>
Revit	B-Application
is	O
available	O
in	O
multiple	O
language	O
localizations	O
:	O
English	O
,	O
German	O
,	O
French	O
,	O
Spanish	O
,	O
Portuguese	O
,	O
Italian	O
,	O
Russian	O
,	O
Polish	O
,	O
Czech	O
,	O
Chinese	O
,	O
Japanese	O
and	O
Korean	O
.	O
</s>
<s>
With	O
the	O
release	O
of	O
Revit	B-Application
2016	O
,	O
Autodesk	O
dropped	O
support	O
for	O
32-bit	B-Application
Windows	I-Application
.	O
</s>
<s>
The	O
Revit	B-Application
work	O
environment	O
allows	O
users	O
to	O
manipulate	O
whole	O
buildings	O
or	O
assemblies	O
(	O
in	O
the	O
project	O
environment	O
)	O
or	O
individual	O
3D	O
shapes	O
(	O
in	O
the	O
family	O
editor	O
environment	O
)	O
.	O
</s>
<s>
However	O
,	O
Revit	B-Application
is	O
not	O
a	O
NURBS	B-Algorithm
modeller	O
and	O
also	O
lacks	O
the	O
ability	O
to	O
manipulate	O
an	O
object	O
's	O
individual	O
polygons	O
except	O
on	O
some	O
specific	O
object	O
types	O
such	O
as	O
roofs	O
,	O
slabs	O
,	O
and	O
terrain	O
or	O
in	O
the	O
massing	O
environment	O
.	O
</s>
<s>
Revit	B-Application
includes	O
categories	O
of	O
objects	O
( 	O
 '	O
families	O
 '	O
in	O
Revit	B-Application
terminology	O
)	O
.	O
</s>
<s>
Revit	B-Application
families	O
can	O
be	O
created	O
as	O
parametric	O
models	O
with	O
dimensions	O
and	O
properties	O
.	O
</s>
<s>
In	O
this	O
way	O
a	O
family	O
defines	O
a	O
geometry	O
that	O
is	O
controlled	O
by	O
parameters	O
,	O
each	O
combination	O
of	O
parameters	O
can	O
be	O
saved	O
as	O
a	O
type	O
,	O
and	O
each	O
occurrence	O
(	O
instance	O
in	O
Revit	B-Application
)	O
of	O
a	O
type	O
can	O
also	O
contain	O
further	O
variations	O
.	O
</s>
<s>
Although	O
Revit	B-Application
software	O
comes	O
with	O
a	O
range	O
of	O
families	O
out	O
of	O
the	O
box	O
(	O
OOTB	O
)	O
,	O
they	O
are	O
limited	O
,	O
so	O
users	O
may	O
find	O
a	O
need	O
to	O
build	O
their	O
own	O
families	O
or	O
buy	O
them	O
from	O
online	O
stores	O
.	O
</s>
<s>
Because	O
of	O
copyright	O
issues	O
in	O
project	O
work	O
,	O
fully	O
3D-modeled	O
Revit	B-Application
project	O
models	O
are	O
rarely	O
for	O
sale	O
.	O
</s>
<s>
However	O
,	O
new	O
practices	O
or	O
students	O
of	O
Revit	B-Application
may	O
want	O
to	O
refer	O
to	O
completed	O
models	O
.	O
</s>
<s>
Since	O
version	O
3.0	O
Revit	B-Application
enables	O
multiple	O
users	O
to	O
work	O
on	O
the	O
same	O
building	O
model	O
.	O
</s>
<s>
The	O
workflow	O
is	O
similar	O
to	O
the	O
use	O
of	O
a	O
version	B-Architecture
control	I-Architecture
system	I-Architecture
in	O
software	O
engineering	O
,	O
that	O
allows	O
multiple	O
developers	O
to	O
reliably	O
collaborate	O
on	O
a	O
common	O
code	O
base	O
.	O
</s>
<s>
Each	O
Revit	B-Application
user	O
works	O
on	O
a	O
local	O
copy	O
of	O
the	O
design	O
,	O
periodically	O
checking	O
in	O
the	O
work	O
into	O
the	O
central	O
repository	O
.	O
</s>
<s>
Patented	O
technology	O
called	O
"	O
worksharing	O
"	O
allows	O
Revit	B-Application
to	O
minimize	O
the	O
set	O
of	O
elements	O
being	O
locked	O
while	O
allowing	O
change	O
propagation	O
engine	O
to	O
update	O
as	O
many	O
elements	O
as	O
needed	O
,	O
including	O
the	O
elements	O
that	O
are	O
not	O
locked	O
.	O
</s>
<s>
Revit	B-Application
typically	O
avoids	O
merge	O
conflicts	O
during	O
check-in	O
.	O
</s>
<s>
In	O
early	O
Revit	B-Application
versions	O
the	O
central	O
repository	O
has	O
been	O
a	O
folder	O
on	O
LAN	O
.	O
</s>
<s>
Since	O
2013	O
Autodesk	O
also	O
offers	O
hosted	O
cloud-based	O
central	O
repositories	O
for	O
Revit	B-Application
as	O
a	O
service	O
.	O
</s>
<s>
When	O
a	O
user	O
creates	O
a	O
building	O
,	O
model	O
,	O
or	O
any	O
other	O
kind	O
of	O
object	O
in	O
Revit	B-Application
,	O
they	O
may	O
use	O
Revit	B-Application
's	O
rendering	O
engine	O
to	O
make	O
a	O
more	O
realistic	O
image	O
of	O
what	O
is	O
otherwise	O
a	O
very	O
diagrammatic	O
model	O
.	O
</s>
<s>
Revit	B-Application
2010	O
comes	O
with	O
a	O
plethora	O
of	O
predefined	O
materials	O
,	O
each	O
of	O
which	O
can	O
be	O
modified	O
to	O
the	O
user	O
's	O
desires	O
.	O
</s>
<s>
Revit	B-Application
models	O
may	O
also	O
be	O
linked	O
directly	O
into	O
Autodesk	B-Language
3ds	I-Language
Max	I-Language
(	O
release	O
2013	O
and	O
later	O
)	O
for	O
more	O
advanced	O
rendering	O
and	O
animation	O
projects	O
with	O
much	O
of	O
their	O
material	O
and	O
object	O
information	O
maintained	O
.	O
</s>
