About: track ball

Premodifier: track
Head noun: ball

Same concepts
http://dbpedia.org/resource/Trackball

Broader concepts

label	provenance	confidence
cursor control device	isap:302535288	0.808417
device	isap:302535284	0.720517
computer input device	isap:302535324	0.720418
user input device	isap:302535286	0.682817
input device	isap:302535287	0.665557
cursor control	isap:6086818	0.620436
peripheral	isap:190251010	0.586360
use	isap:129061713	0.563958
alternative	isap:418108236	0.559071
computer mouse	isap:89406957	0.545184
device 32	isap:302535309	0.521401
pointer	isap:9919149	0.453073
evice	isap:90862659	0.448966
control	isap:6086815	0.442843
type	isap:179650606	0.434812
means	isap:88416811	0.433375
gui point device	isap:129019915	0.395940
keyboard	isap:454472985	0.372281
like	isap:178760502	0.362591
mechanism	isap:287278607	0.361932
case	isap:166104518	0.305923
gui	isap:129019916	0.290582
input	isap:91183400	0.284684

Narrower concepts

label	provenance	confidence
cursor control device	isap:489891068	0.562553
input device	isap:489891070	0.334736
device	isap:489891065	0.159780