Ic components identification help

Just wondering if someone could point me in the corection direction for these two chips identification.
Looking for data sheets for each.

Thanks for your help.

First IC is a National Semiconductor (NS) version (DM8060N) of a SN7460N TTL Dual 4-Input Expander manufactured the 48th week of 1969 (6948).

Second IC is a Signetics (S logo) 74LS260N LS TTL Dual 5-input NOR Gates manufactured the 10th week of 1985 (8510).