<s>
Fjölnir	B-Language
(	O
also	O
Fjolnir	B-Language
or	O
Fjoelnir	B-Language
)	O
is	O
a	O
programming	O
language	O
developed	O
by	O
professor	O
Snorri	O
Agnarsson	O
of	O
computer	B-General_Concept
science	I-General_Concept
at	O
Háskóli	O
Íslands	O
(	O
University	O
of	O
Iceland	O
)	O
that	O
was	O
mostly	O
used	O
in	O
the	O
1980s	O
.	O
</s>
<s>
Fjölnir	B-Language
is	O
based	O
on	O
the	O
concept	O
of	O
representing	O
programs	O
as	O
trees	O
,	O
and	O
packages	O
by	O
substitutions	O
on	O
trees	O
using	O
algebraic	O
operators	O
.	O
</s>
