http://www.a1articles.com en-us editorial@a1articles.com Pay Per Call (PPCa) Introduction Pay Per Call is a new advertising service in the search engine marketing revolution. There are millions of companies in the UK, most of them are small to medium sized businesses which do not have websites will defini... http://www.a1articles.com/article_15990_7.html 16th November 2005 Pay Per Call (PPCa) Introduction Pay Per Call is a new advertising service in the search engine marketing revolution. There are millions of companies in the UK, most of them are small to medium sized businesses which do not have websites wil... http://www.a1articles.com/article_15798_6.html 16th November 2005