	nat l computer nlcs o to buy data card stake national computer systems inc said it agreed to uire deluxe check printers inc s dlx pct stake in data card corp national computer said it plans to issue mln dlrs in five year subordinated convertible debentures to purchase the shares of data card from deluxe completion of the proposed transaction subject to regulatory approval is expected in mid july it said the debenture will bear an increasing rate of interest over its term with a pct weighted average rate and will be convertible into national computer common stock at dlrs a share it said separately deluxe said its data card investment no longer fits its business strategy deluxe has held an interest in data card since when it provided funds for data card to buy troy computer products corp in november data card said it planned to sell its troy division reuter 
