<s>
Thor-CD	B-Application
was	O
a	O
re-recordable	O
CD	O
format	O
proposed	O
in	O
1988	O
by	O
Tandy	O
.	O
</s>
<s>
Several	O
years	O
before	O
recordable	O
compact	O
discs	O
were	O
introduced	O
,	O
Tandy	O
Corporation	O
announced	O
a	O
similar	O
CD	O
format	O
named	O
Thor-CD	B-Application
,	O
but	O
after	O
being	O
pushed	O
back	O
for	O
several	O
years	O
,	O
it	O
was	O
finally	O
cancelled	O
due	O
to	O
steep	O
manufacturing	O
costs	O
.	O
</s>
<s>
However	O
,	O
the	O
introduction	O
of	O
the	O
CD-ROM	B-Device
format	O
,	O
which	O
was	O
incompatible	O
with	O
Tandy	O
's	O
proposal	O
,	O
all	O
but	O
killed	O
Tandy	O
's	O
product	O
.	O
</s>
