While ABA can be used in a natural setting (a playground, for example), it is not intended to build emotional or social skills. So, for example, while ABA might teach a child to shake hands or greet another person with a handshake, it won't help that child to feel an emotional connection with another person.
Definition of an invoice. An invoice is a document that a business issues to its customers, asking the customers to pay for the goods or services that the business has supplied to them. Invoices can be issued either before or after the goods or services are supplied.
On the other hand, invoice refers to a commercial instrument delivered to the buyer containing the details of products or services provided by the seller. Proforma invoice is a kind of quotation, containing a commitment by the seller to supply goods at the specified rate and date. Conversely, Invoice is a sort of bill, displaying the amount due to the buyer. Proforma invoice is used for the creation of sales, whereas invoice is used for confirmation of sale.