<s>
PostBooks	B-Application
is	O
a	O
proprietary	B-Application
accounting	O
and	O
enterprise	O
resource	O
planning	O
business	O
system	O
geared	O
toward	O
small	O
to	O
medium-sized	O
businesses	O
.	O
</s>
<s>
It	O
used	O
to	O
be	O
released	O
under	O
an	O
open	B-Application
source	I-Application
CPAL	B-License
license	O
on	O
GitHub	B-Application
,	O
but	O
was	O
made	O
non-free	B-Application
in	O
June	O
2019	O
.	O
</s>
<s>
Postbooks	B-Application
was	O
based	O
on	O
the	O
commercially	O
licensed	O
xTuple	B-Application
ERP	O
system	O
created	O
by	O
xTuple	B-Application
,	O
a	O
private	O
software	O
company	O
based	O
in	O
Norfolk	O
,	O
Virginia	O
(	O
VA	O
)	O
,	O
United	O
States	O
.	O
</s>
<s>
The	O
name	O
PostBooks	B-Application
is	O
derived	O
from	O
three	O
aspects	O
of	O
the	O
project	O
.	O
</s>
<s>
Second	O
,	O
the	O
name	O
refers	O
to	O
the	O
project	O
's	O
technological	O
roots	O
as	O
it	O
runs	O
exclusively	O
on	O
the	O
PostgreSQL	B-Application
database	O
.	O
</s>
<s>
Finally	O
,	O
the	O
name	O
suggests	O
PostBooks	B-Application
as	O
a	O
logical	O
step	O
of	O
progression	O
for	O
businesses	O
that	O
have	O
outgrown	O
the	O
popular	O
QuickBooks	B-Application
small	O
business	O
accounting	O
product	O
by	O
Intuit	O
.	O
</s>
<s>
PostBooks	B-Application
is	O
the	O
foundation	O
of	O
the	O
xTuple	B-Application
ERP	O
software	O
developed	O
and	O
marketed	O
by	O
the	O
company	O
of	O
the	O
same	O
name	O
beginning	O
in	O
the	O
year	O
2000	O
.	O
</s>
<s>
All	O
of	O
the	O
xTuple	B-Application
ERP	O
Editions	O
are	O
targeted	O
toward	O
small	O
to	O
midsize	O
companies	O
.	O
</s>
<s>
PostBooks	B-Application
is	O
offered	O
on	O
a	O
commercial	O
base	O
in	O
the	O
Distribution	O
Edition	O
,	O
the	O
Manufacturing	O
Edition	O
,	O
and	O
the	O
Enterprise	O
Edition	O
.	O
</s>
<s>
The	O
first	O
stable	O
release	O
of	O
PostBooks	B-Application
was	O
version	O
2.2.0	O
announced	O
in	O
September	O
2007	O
when	O
its	O
code	O
was	O
first	O
made	O
publicly	O
available	O
on	O
SourceForge	B-Application
.	O
</s>
<s>
Since	O
then	O
source	O
code	O
management	O
has	O
been	O
moved	O
to	O
GitHub	B-Application
.	O
</s>
<s>
On	O
June	O
20	O
,	O
2019	O
it	O
was	O
announced	O
the	O
distribution	O
of	O
the	O
free	O
PostBooks	B-Application
Editions	O
has	O
been	O
discontinued	O
.	O
</s>
<s>
PostBooks	B-Application
is	O
divided	O
into	O
7	O
functional	O
modules	O
:	O
Accounting	O
,	O
Sales	O
,	O
CRM	O
,	O
Manufacture	O
,	O
Purchase	O
,	O
Inventory	O
and	O
Products	O
.	O
</s>
<s>
The	O
difference	O
between	O
PostBooks	B-Application
and	O
commercial	O
editions	O
is	O
completely	O
managed	O
in	O
the	O
database	O
schema	O
where	O
the	O
Commercial	O
database	O
includes	O
additional	O
tables	O
and	O
functions	O
to	O
support	O
larger	O
enterprises	O
.	O
</s>
<s>
The	O
PostBooks	B-Application
project	O
includes	O
two	O
application	O
interface	O
options	O
:	O
a	O
locally	O
installed	O
Graphical	B-Application
User	I-Application
Interface	I-Application
(	O
GUI	B-Application
)	O
client	O
and	O
a	O
REST	O
based	O
web	O
services	O
API	B-General_Concept
for	O
integration	O
with	O
third-party	O
applications	O
,	O
all	O
of	O
which	O
feed	O
into	O
the	O
same	O
PostgreSQL	B-Application
back	O
end	O
database	O
.	O
</s>
<s>
The	O
GUI	B-Application
client	O
is	O
using	O
a	O
client	B-Operating_System
–	I-Operating_System
server	I-Operating_System
methodology	O
written	O
in	O
C++	B-Language
using	O
the	O
Qt	B-Language
framework	I-Language
.	O
</s>
<s>
Both	O
the	O
Qt	B-Language
client	O
and	O
PostgreSQL	B-Application
database	O
server	O
may	O
be	O
run	O
on	O
Windows	B-Application
,	O
Macintosh	B-Device
,	O
or	O
Linux	B-Application
operating	I-Application
systems	I-Application
.	O
</s>
<s>
The	O
GUI	B-Application
client	O
also	O
uses	O
the	O
OpenRPT	O
report	O
writer	O
and	O
renderer	O
as	O
its	O
embedded	O
reporting	O
engine	O
.	O
</s>
<s>
OpenRPT	O
is	O
an	O
LGPL	B-Application
licensed	O
open	B-Application
source	I-Application
project	O
also	O
administered	O
by	O
xTuple	B-Application
and	O
hosted	O
on	O
GitHub	B-Application
.	O
</s>
<s>
The	O
web	O
client	O
is	O
written	O
entirely	O
in	O
JavaScript	O
using	O
Enyo	B-Language
to	O
manage	O
the	O
presentation	O
layer	O
and	O
Backbone	B-Language
for	O
the	O
model	O
layer	O
.	O
</s>
<s>
It	O
communicates	O
with	O
a	O
NodeJS	B-Language
server	O
which	O
provides	O
the	O
REST	O
web	O
services	O
interface	O
.	O
</s>
<s>
The	O
web	O
client	O
uses	O
Pentaho	B-Application
to	O
provide	O
reporting	O
and	O
business	O
intelligence	O
functions	O
.	O
</s>
<s>
One	O
of	O
the	O
major	O
advantages	O
of	O
the	O
PostBooks	B-Application
(	O
and	O
commercial	O
)	O
software	O
is	O
the	O
technology	O
it	O
is	O
written	O
in	O
,	O
which	O
allows	O
significant	O
customization	O
of	O
the	O
database	O
and	O
functionality	O
of	O
the	O
system	O
.	O
</s>
<s>
As	O
such	O
PostBooks	B-Application
can	O
be	O
modified	O
to	O
meet	O
the	O
requirements	O
of	O
most	O
organizations	O
.	O
</s>
<s>
Before	O
going	O
proprietary	B-Application
,	O
PostBooks	B-Application
had	O
a	O
mature	O
and	O
established	O
community	O
.	O
</s>
<s>
While	O
the	O
project	O
was	O
technically	O
maintained	O
on	O
GitHub	B-Application
,	O
most	O
community	O
activity	O
is	O
initiated	O
at	O
the	O
xTuple	B-Application
hosted	O
community	O
website	O
where	O
additional	O
forums	O
and	O
technical	O
documents	O
are	O
available	O
.	O
</s>
<s>
PostBooks	B-Application
is	O
written	O
using	O
English	O
as	O
the	O
base	O
language	O
but	O
has	O
been	O
or	O
is	O
being	O
translated	O
into	O
several	O
languages	O
by	O
the	O
community	O
at	O
large	O
including	O
Spanish	O
,	O
French	O
,	O
German	O
,	O
Russian	O
,	O
Turkish	O
,	O
Chinese	O
and	O
Portuguese	O
.	O
</s>
