Very few (if any) laptops these days are NOT wireless enabled.
Those laptops which are wireless enabled can connect to wi-fi hotspots and a wireless network/router within the home.
You say "Specs include such terms as "built in wireless networking" not available, yet they have 802.11 b/g/n wireless networking standard"
That's a contradiction in terms. If a laptop has the 802.11 standard fitted (as a mini card for example), it's wireless-enabled.