<s>
PROIV	B-Language
(	O
pronounced	O
"	O
pro	O
four	O
"	O
)	O
is	O
now	O
marketed	O
as	O
a	O
low	B-Architecture
code	I-Architecture
development	I-Architecture
platform	I-Architecture
by	O
its	O
current	O
steward	O
,	O
Zellis	O
Holdings	O
,	O
a	O
British	O
HR	O
services	O
company	O
.	O
</s>
<s>
PROIV	B-Language
was	O
originally	O
developed	O
as	O
a	O
Fourth-generation	B-Language
programming	I-Language
language	I-Language
(	O
4GL	B-Language
)	O
,	O
PROIV	B-Language
and	O
another	O
4GL	B-Language
are	O
aiming	O
to	O
simplify	O
and	O
reduce	O
efforts	O
to	O
create	O
and	O
develop	O
computer	O
programs	O
compared	O
to	O
third-generation	O
programming	O
languages	O
(	O
3GL	O
)	O
such	O
as	O
Cobol	B-Application
and	O
Fortran	B-Application
.	O
</s>
<s>
PROIV	B-Language
's	O
usual	O
application	O
domain	O
is	O
database-centric	O
business	O
applications	O
.	O
</s>
<s>
PROIV	B-Language
programs	O
consist	O
of	O
declarative/non	O
-procedural	O
specifications	O
that	O
control	O
the	O
overall	O
structure	O
of	O
the	O
program	O
and	O
database	O
access	O
and	O
that	O
have	O
an	O
implicit	O
sequence	O
of	O
execution	O
(	O
which	O
PROIV	B-Language
programmers	O
refer	O
to	O
as	O
the	O
timing	O
cycle	O
)	O
.	O
</s>
<s>
Procedural	O
subroutines	O
can	O
be	O
added	O
by	O
the	O
programmer	O
;	O
these	O
are	O
written	O
in	O
a	O
3GL-like	O
language	O
which	O
PROIV	B-Language
calls	O
"	O
Logic	O
"	O
.	O
</s>
<s>
PROIV	B-Language
was	O
developed	O
by	O
Sushil	O
K	O
.	O
Garg	O
working	O
in	O
Hawaii	O
in	O
1976	O
on	O
a	O
General	O
Automation	O
System	O
.	O
</s>
<s>
MDIS	O
converted	O
PROIV	B-Language
to	O
run	O
on	O
their	O
Pick-based	O
systems	O
and	O
this	O
spin-off	O
was	O
known	O
as	O
ALL	O
(	O
Application	O
Language	O
Liberator	O
)	O
.	O
</s>
<s>
PROIV	B-Language
was	O
ported	O
to	O
several	O
different	O
platforms	O
by	O
separate	O
teams	O
.	O
</s>
<s>
During	O
the	O
second	O
half	O
of	O
the	O
1980s	O
,	O
a	O
PROIV	B-Language
team	O
entered	O
in	O
the	O
4GL	B-Language
Grand	O
Prix	O
contests	O
of	O
1987	O
,	O
1988	O
,	O
and	O
1990	O
and	O
the	O
product	O
finished	O
second	O
on	O
each	O
occasion	O
.	O
</s>
<s>
PROIV	B-Language
runs	O
OS-independent	O
application	O
code	O
in	O
an	O
OS-specific	O
virtual	B-Architecture
machine	I-Architecture
,	O
allowing	O
a	O
user	O
application	O
to	O
run	O
unaltered	O
on	O
different	O
computing	O
platforms	O
.	O
</s>
<s>
,	O
Zellis	O
claims	O
support	O
for	O
PROIV	B-Language
on	O
Microsoft	B-Application
Windows	I-Application
(	O
workstation	O
and	O
server	O
)	O
,	O
Red	O
Hat	O
Linux	O
,	O
IBM	B-Application
AIX	I-Application
,	O
and	O
Oracle	B-Application
Solaris	I-Application
;	O
with	O
Oracle	B-General_Concept
,	O
SQL	B-Application
Server	I-Application
,	O
PostgreSQL	B-Application
,	O
and	O
IBM	B-Application
C-ISAM	I-Application
as	O
the	O
database	O
backend	O
.	O
</s>
<s>
The	O
PROIV-supplied	O
"	O
GUI	B-Application
client	O
"	O
,	O
which	O
renders	O
the	O
rich-client	O
UI	O
for	O
applications	O
written	O
in	O
PROIV	B-Language
,	O
is	O
based	O
around	O
ActiveX	B-Application
technology	O
and	O
works	O
only	O
on	O
Windows	O
client	O
platforms	O
.	O
</s>
<s>
Consequently	O
,	O
the	O
programmers	O
 '	O
development	O
environments	O
supplied	O
with	O
more-recent	O
PROIV	B-Language
releases	O
also	O
work	O
only	O
on	O
a	O
Windows	O
client	O
platform	O
.	O
</s>
