<s>
Maekawa	B-Operating_System
's	I-Operating_System
algorithm	I-Operating_System
is	O
an	O
algorithm	O
for	O
mutual	B-Operating_System
exclusion	I-Operating_System
on	O
a	O
distributed	B-Architecture
system	I-Architecture
.	O
</s>
<s>
ts	O
refers	O
to	O
the	O
local	O
time	O
stamp	O
of	O
the	O
system	O
according	O
to	O
its	O
logical	B-Operating_System
clock	I-Operating_System
.	O
</s>
