FPO - 'ords' are the basic shares issued by a company
Partly paid are shares in the company where investors have paid a deposit and have a given(known) timeframe to pay the rest or the company can call for payment on partly paid shares.
If payments are missed when due or called by the company the investor loses the amount already paid and the company can auction such shares.
Preference shares - rank higher than ordinary shares in the event of the company going bankrupt. They may also carry a higher amount in dividends.
The may also convert into ordinary shares in the future at a given conversion rate.