<s>
PSI-Plot	B-Application
is	O
a	O
scientific	O
and	O
engineering	O
data	O
analysis	O
and	O
technical	O
plotting	O
software	O
developed	O
by	O
Poly	O
Software	O
International	O
,	O
Inc	O
.	O
</s>
<s>
PSI-Plot	B-Application
is	O
maintained	O
on	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
systems	I-Application
,	O
and	O
the	O
current	O
version	O
is	O
9.5	O
for	O
Windows	B-Device
98	I-Device
to	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
PSI-Plot	B-Application
was	O
developed	O
by	O
Poly	O
Software	O
International	O
,	O
Inc	O
.	O
in	O
September	O
1992	O
,	O
under	O
the	O
name	O
TechPlot	O
for	O
MS-DOS	B-Application
.	O
</s>
<s>
The	O
name	O
was	O
later	O
changed	O
to	O
PS-Plot	O
,	O
and	O
changed	O
again	O
to	O
the	O
current	O
PSI-Plot	B-Application
.	O
</s>
<s>
PSI-Plot	B-Application
later	O
migrated	O
from	O
MS-DOS	B-Application
to	O
the	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
Currently	O
,	O
PSI-Plot	B-Application
is	O
used	O
by	O
more	O
than	O
75,000	O
scientists	O
and	O
engineers	O
worldwide	O
.	O
</s>
<s>
PSI-Plot	B-Application
features	O
an	O
Excel-style	O
spreadsheet	O
where	O
users	O
can	O
manage	O
and	O
analyze	O
their	O
data	O
,	O
perform	O
various	O
numerical	O
calculations	O
,	O
solve	O
their	O
equations	O
,	O
and	O
visualize	O
their	O
data	O
in	O
2D	O
and	O
3D	O
graphics	O
.	O
</s>
<s>
Users	O
can	O
also	O
import	O
their	O
data	O
from	O
various	O
formats	O
including	O
Microsoft	B-Application
Excel	I-Application
,	O
ASCII	B-Protocol
,	O
CSV	O
,	O
Microsoft	B-Application
Access	I-Application
,	O
and	O
dBase	B-Application
.	O
</s>
<s>
PSI-Plot	B-Application
also	O
includes	O
an	O
eighteen-lesson	O
tutorial	O
for	O
new	O
users	O
to	O
introduce	O
them	O
to	O
the	O
basics	O
of	O
PSI-Plot	B-Application
.	O
</s>
<s>
PSI-Plot	B-Application
has	O
implemented	O
a	O
broad	O
ranges	O
of	O
commonly	O
used	O
data	O
analysis	O
methods	O
,	O
which	O
include	O
data	O
interpolation	O
,	O
three	O
different	O
methods	O
(	O
Levenberg-Marquardt	B-Algorithm
,	O
Powell	B-Algorithm
,	O
and	O
Simplex	B-Algorithm
)	O
for	O
non-linear	O
curve	O
fitting	O
,	O
over	O
one	O
hundred	O
built-in	O
fitting	O
models	O
,	O
multiple	O
linear	O
fitting	O
,	O
stepwise	O
multiple	O
liner	O
fitting	O
,	O
generalized	O
linear	O
models	O
(	O
GMLs	O
)	O
,	O
dose-response	O
analysis	O
,	O
digital	B-General_Concept
signal	I-General_Concept
processing	I-General_Concept
(	O
DSP	O
)	O
,	O
matrix	O
manipulation	O
and	O
eigen-problems	O
,	O
ordinary	O
differential	O
equations	O
(	O
ODE	O
)	O
solvers	O
,	O
algebraic	O
equation	O
solvers	O
,	O
difference	O
equation	O
solvers	O
,	O
and	O
other	O
methods	O
.	O
</s>
<s>
PSI-Plot	B-Application
provides	O
various	O
2D	O
and	O
3D	O
plot	O
types	O
and	O
allows	O
users	O
to	O
customize	O
the	O
graphics	O
in	O
great	O
detail	O
for	O
visual	O
presentations	O
and	O
for	O
submission	O
to	O
research	O
journals	O
for	O
publication	O
.	O
</s>
<s>
PSI-Plot	B-Application
supports	O
2D	O
and	O
3D	O
Cartesian	O
coordinate	O
systems	O
as	O
well	O
as	O
special	O
coordinate	O
systems	O
such	O
as	O
polar	O
,	O
Smith	B-Application
,	O
ternary	O
(	O
triangle	O
)	O
,	O
Nichols	B-Application
,	O
cylindrical	O
,	O
and	O
spherical	O
systems	O
.	O
</s>
<s>
ProStat	B-Application
is	O
the	O
sister	O
software	O
to	O
PSI-Plot	B-Application
.	O
</s>
<s>
ANOVA	B-General_Concept
in	O
PSI-Plot	B-Application
becomes	O
ANOVA	B-General_Concept
,	O
ANCOVA	B-General_Concept
and	O
MANOVA	B-General_Concept
in	O
ProStat	B-Application
,	O
while	O
the	O
range	O
of	O
plot	O
types	O
in	O
ProStat	B-Application
is	O
extended	O
in	O
PSI-Plot	B-Application
by	O
the	O
addition	O
of	O
options	O
such	O
as	O
Pareto	O
charts	O
,	O
Smith	B-Application
curves	O
,	O
ternary	O
,	O
vector	O
,	O
and	O
column	O
plots	O
.	O
</s>
