<s>
CO2SYS	B-Application
is	O
a	O
family	O
of	O
software	O
programs	O
that	O
calculate	O
chemical	O
equilibria	O
for	O
aquatic	O
inorganic	O
carbon	O
species	O
and	O
parameters	O
.	O
</s>
<s>
CO2SYS	B-Application
was	O
first	O
published	O
by	O
Ernie	O
Lewis	O
and	O
Doug	O
Wallace	O
in	O
1998	O
as	O
a	O
DOS-interface	O
program	O
written	O
in	O
QBasic	O
.	O
</s>
<s>
Subsequent	O
developments	O
have	O
included	O
several	O
MATLAB	B-Language
implementations	O
,	O
two	O
Microsoft	B-Application
Excel	I-Application
templates	O
,	O
a	O
Python	B-Language
package	O
"	O
PyCO2SYS	O
"	O
,	O
and	O
an	O
R	B-Language
package	O
inspired	O
by	O
CO2SYS	B-Application
,	O
"	O
seacarb	O
"	O
.	O
</s>
<s>
Development	O
of	O
the	O
various	O
CO2SYS	B-Application
programs	O
continues	O
as	O
of	O
2021	O
with	O
the	O
addition	O
of	O
more	O
chemical	O
equilibrium	O
parameters	O
and	O
compatibility	O
with	O
a	O
wider	O
range	O
of	O
environments	O
,	O
e.g.	O
</s>
