 One of Innis 's primary contributions to communications studies was to apply the dimensions of time and space to various media . He divided media into time @-@ binding and space @-@ binding types . Time @-@ binding media are durable . They include clay or stone tablets . Space @-@ binding media are more ephemeral . They include modern media such as radio , television , and mass circulation newspapers . 
 One of Innis <a href='null_genetive' title='1'><mark>'s</mark></a>primary contributions to communications studies was to apply the dimensions of time and space to various media . He divided media into time @-@ binding and space @-@ binding types . Time @-@ binding media <a href='drop_aux' title='2'><mark>are</mark></a>durable . They include clay or stone tablets . Space @-@ binding media <a href='drop_aux' title='3'><mark>are</mark></a>more ephemeral . They include modern media such as radio , television , and mass circulation newspapers . 
One of Innis  primary contributions to communications studies was to apply the dimensions of time and space to various media . He divided media into time @-@ binding and space @-@ binding types . Time @-@ binding media durable . They include clay or stone tablets . Space @-@ binding media more ephemeral . They include modern media such as radio , television , and mass circulation newspapers .