\"whether or not the viruses\" is not used to classify viruses. Viruses are classified based on the type of genetic material. They have either DNA or RNA but not both. If DNA is present, it may be single stranded or double stranded. In the same way RNA may also be single stranded or double stranded. Based on the presence or absence of envelope they are again classified into enveloped and non enveloped viruses. HIV is RNA virus and enveloped. Herepes virus is DNA virus and enveloped. Polio virus is RNA virus and non enveloped. Solution \"whether or not the viruses\" is not used to classify viruses. Viruses are classified based on the type of genetic material. They have either DNA or RNA but not both. If DNA is present, it may be single stranded or double stranded. In the same way RNA may also be single stranded or double stranded. Based on the presence or absence of envelope they are again classified into enveloped and non enveloped viruses. HIV is RNA virus and enveloped. Herepes virus is DNA virus and enveloped. Polio virus is RNA virus and non enveloped..