<s>
PDOS	B-Operating_System
is	O
a	O
discontinued	O
multiuser	O
multitasking	O
operating	O
system	O
,	O
written	O
in	O
assembly	B-Language
language	I-Language
developed	O
in	O
the	O
early	O
1980s	O
by	O
the	O
Eyring	O
Research	O
Institute	O
for	O
the	O
Texas	B-General_Concept
Instruments	I-General_Concept
TMS9900	I-General_Concept
processor	O
,	O
and	O
later	O
ported	O
to	O
the	O
Motorola	B-Device
68000	I-Device
processor	I-Device
.	O
</s>
