CREATE TABLE "table1_18950885_3" (
  "graphics_mode" real,
  "char_cells" text,
  "pixels" text,
  "hardware_colours" real,
  "used_kb" real,
  "map" text,
  "type" text
);

Question: What is the used (kb) when the graphics mode is 4?
SQL: SELECT MIN("used_kb") FROM "table1_18950885_3" WHERE "graphics_mode"=4;

Question: If graphics mode is less than 1.0, what are the char cells?
SQL: SELECT "char_cells" FROM "table1_18950885_3" WHERE "graphics_mode"<1.0;